怎么用Emefotae文件能用pr打开吗十六进制
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时间：2018-02-03 14:50
怎么用Emefotpr打开十六进制_百度知道
怎么用Emefotpr打开十六进制
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二进制的：0.11用75去除8的地数在加小数点，16的同上
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我们会通过消息、邮箱等方式尽快将举报结果通知您。求大神指导一下下面该怎么弄。找到TslGame\Content\Paks过检测的文件最后是ｌ结尾右键Emefotpr以十六进制打开【计算机吧】_百度贴吧
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求大神指导一下下面该怎么弄。找到TslGame\Conten收藏
求大神指导一下下面该怎么弄。找到TslGame\Content\Paks过检测的文件最后是ｌ结尾右键Emefotpr以十六进制打开，50 76 22 F3 97 58 B5 E7
58 B2 DA ED 2A CD BF 4E复制粘贴上面的字符到搜索，删除掉就保存
勤哲Excel服务器学习和下载.会Excel,懂管理,就能做计算机管理信息系统及手机app.软博会金奖产品,适合于各行各业的管理人员使用.
知道怎么弄留个联系方式
楼主能教下吗
50 76 22 F3 97 58 B5 E7
58 B2 DA ED 2A CD BF 4E
这个根本找不到
登录百度帐号推荐应用绝地求生VAC禁封游戏继续上号玩的方法！ - 『精品软件区』
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绝地求生VAC禁封游戏继续上号玩的方法！
阅读权限10
最新跳过VAC进入游戏教程 & && && && && && && && && && && && && && && && && && && && && && && && && &教程一：首先讲解一下Steam和蓝洞游戏的关联，Stame是一个游戏平台，容纳了吃鸡游戏，如果你只是被游戏禁封，那么你的你的Stame任何游戏都能继续，如果你是被Stame禁封那么你，就相当于你游戏从此到了尽头，如今经过不停测试发现了一种办法，可以跳过Stame平台的禁封直接在游戏内部玩游戏 ，而不再会禁封，上号蓝洞的BUG现在附上已经被禁封的VAC账户示例图
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不要质疑辅助的正确性辅助，是绝对安全可靠的，需要注入，
相当于填补ＢＵG的编码才可以，正常运行。下面我们来讲解如何操作修改漏洞。
首先先到C盘中寻找你的Stame文件，怎么寻找，打开你的Stame然后找到吃鸡，游戏属性，浏览本地文件，找到Stame所在
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地然后找到TslGame\Content\Paks过检测的文件最后是ｌ结尾
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右键Emefotpr以十六进制打开，50 76 22 F3 97 58 B5 E7&&58 B2 DA ED 2A CD BF 4E复制粘贴上面的字符到搜索，
删除掉就保存 上游戏，然后如果游戏运行失败，就登录体验服你就会发现，
游戏可以正常运行，然后你匹配的人也是正版服务器的人,必须使用Steam登录，
登录后登录绝地求生体验服，即可。
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12:25 上传
箭头处即为Steam体验服，登录上去就可以游戏了，与正服没有区别。
& && && && && && && && && && &
& && && && && && && && && && && & 第二种方法& && & 教程二：
把两个DLL文件注入到某盘 steam -----BIN文件夹里面& &
把两个DLL文件注入到某盘&&steam -----BIN文件夹里面& &
注入DLL作用是你进去测试服的时候 转变成正式服必须使用Steam登录，
登录后登录绝地求生体验服，你就会发现& &
你在体验服遇到的事正式服的人& &&&
但是只能单排&&不能双排多排你可以试试& &
不兼容会秒退游戏 账户被封了之后& &
需要换台机子重新注入DLL 再强调一遍进去游戏不是体验服游戏& &&&
是正服只是换种登录方式下边是第二种方式需要的文件链接: https://pan.baidu.com/s/1htvAAAo 密码: 8vzj
吾爱币 +17
热心值 +16
dll注入的考智商呢？hash值跟原文件一样。
热心回复！
谢谢@Thanks！
稳定透视自瞄破解版https://pan.lanzou.com/u/juedifugua
怎么注入？是直接复制还是用软件从注入？
热心回复！
这个我昨天已经放出来了 你确实是能玩 可是我想说你不能和别人组队 也就是.
Emefotpr是什么啊大佬
BIN文件夹？我怎么找到2个bin什么的文件夹？
这么注入？是直接复制到文件夹下？还是需要软件注入，说明白好吗？
我很赞同！
不能跟朋友一起玩 还是买个号吧
怎么注入???
我去试试了~！右键十六进制就是Winhex!~
注入器有没有发一个
吃鸡测试服就算被ban也能上，填个毛线的十六进制，方法2的文件跟steam原来.
搜不到那串代码啊
能不能改改错别字，你那个stame看得我很难受。。
Emefotpr是什么东西= =
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
感觉一群孤儿大军正在来袭，赶紧去试试吧。孤儿们。
素质论坛。
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
Emefotpr 楼主可以共享一下吗？谢谢了
你可以下载安装个UltraEdit& & 然后右键文件 属性& &打开方式 选UltraEdit就好了&&但是我没搜到这串字符
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
Emefotpr这个到底是啥
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
某刀转的。。。。
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
试试 不知道能用不
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
先谢谢了, 马上试一下
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
66666感谢感谢
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
试试能用的说声
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
相反原理，是不是可以用体验服的号玩正服，这样不就相当于改了个名字玩吗
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
马上去试试
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
网上看见这个教程太多了，图片都是一模一样，还没看见那个评论的成功过.
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
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Comsenz Inc.From Wikipedia, the free encyclopedia
Perl is a family of , , , . The languages in this family include Perl 5 and .
Though Perl is not officially an acronym, there are various
in use, including "Practical
and Reporting Language". Perl was originally developed by
in 1987 as a general-purpose
to make report processing easier. Since then, it has undergone many changes and revisions. , which began as a redesign of Perl 5 in 2000, eventually evolved into a separate language. Both languages continue to be developed independently by different development teams and liberally borrow ideas from one another.
The Perl languages borrow features from other programming languages including ,
(), , Wall also alludes to
in the introduction to
(Schwartz & Christiansen) and so on.
They provide powerful text processing facilities without the arbitrary data-length limits of many contemporary , facilitating easy manipulation of . Perl 5 gained widespread popularity in the late 1990s as a
language, in part due to its then unsurpassed
abilities.
In addition to CGI, Perl 5 is used for , , finance, , and other applications, such as for . It has been nicknamed "the Swiss Army chainsaw of scripting languages" because of its flexibility and power, and also its ugliness. In 1998, it was also referred to as the " that holds the Internet together", in reference to both its ubiquitous use as a
and its perceived inelegance.
began work on Perl in 1987, while working as a programmer at , and released version 1.0 to the comp.sources.misc
on December 18, 1987. The language expanded rapidly over the next few years.
Perl 2, released in 1988, featured a better regular expression engine. Perl 3, released in 1989, added support for
Originally, the only documentation for Perl was a single lengthy . In 1991, , known to many Perl programmers as the "Camel Book" because of its cover, was published and became the de facto reference for the language. At the same time, the Perl version number was bumped to 4, not to mark a major change in the language but to identify the version that was well documented by the book.
Perl 4 went through a series of , culminating in Perl 4.036 in 1993. At that point, Wall abandoned Perl 4 to begin work on Perl 5. Initial design of Perl 5 continued into 1994. The perl5-porters
was established in May 1994 to coordinate work on porting Perl 5 to different platforms. It remains the primary forum for development, maintenance, and porting of Perl 5.
Perl 5.000 was released on October 17, 1994. It was a nearly complete rewrite of the , and it added many new features to the language, including , , , and . Importantly, modules provided a mechanism for extending the language without modifying the interpreter. This allowed the core interpreter to stabilize, even as it enabled ordinary Perl programmers to add new language features. Perl 5 has been in active development since then.
Perl 5.001 was released on March 13, 1995. Perl 5.002 was released on February 29, 1996 with the new prototypes feature. This allowed module authors to make
that behaved like Perl . Perl 5.003 was released June 25, 1996, as a security release.
One of the most important events in Perl 5 history took place outside of the language proper and was a consequence of its module support. On October 26, 1995, the
(CPAN) was established as a
and P as of May 2017, it carries over 185,178 modules in 35,190 distributions, written by more than 13,071 authors, and is mirrored worldwide at more than 245 locations.
Perl 5.004 was released on May 15, 1997, and included among other things the UNIVERSAL package, giving Perl a base object to which all
were automatically derived and the ability to require versions of modules. Another significant development was the inclusion of the
module, which contributed to Perl's popularity as a .
Perl is also now supported running under
and several other operating systems.
Perl 5.005 was released on July 22, 1998. This release included several enhancements to the
engine, new hooks into the backend through the B::* modules, the qr// regex quote operator, a large selection of other new core modules, and added support for several more operating systems, including .
Major version
Latest update
Old version, no longer supported: 5.5
Old version, no longer supported: 5.6
Old version, no longer supported: 5.8
Old version, no longer supported: 5.10
Old version, no longer supported: 5.12
Old version, no longer supported: 5.14
Old version, no longer supported: 5.16
Old version, no longer supported: 5.18
Old version, no longer supported: 5.20
Old version, no longer supported: 5.22
Older version, yet still supported: 5.24
Current stable version: 5.26
Legend:Old versionOlder version, still supportedCurrent stable versionLatest preview versionFuture release
Perl 5.6 was released on March 22, 2000. Major changes included
string representation, support for files over 2 GiB, and the "our" keyword. When developing Perl 5.6, the decision was made to switch the
scheme to one more similar to other
after 5.005_63, the next version became 5.5.640, with plans for development versions to have odd numbers and stable versions to have even numbers.
In 2000, Wall put forth a call for suggestions for a new version of Perl from the community. The process resulted in 361 RFC (request for comments) documents that were to be used in guiding development of Perl 6. In 2001, work began on the "Apocalypses" for , a series of documents meant to summarize the change requests and present the design of the next generation of Perl. They were presented as a digest of the RFCs, rather than a formal document. At this point, Perl 6 existed only as a description of a language.
Perl 5.8 was first released on July 18, 2002, and had nearly yearly updates since then. Perl 5.8 improved Unicode support, added a new I/O implementation, added a new thread implementation, improved numeric accuracy, and added several new modules. As of 2013 this version still remains the most popular version of Perl and is used by Red Hat 5, Suse 10, Solaris 10, HP-UX 11.31 and AIX 5.
In 2004, work began on the "Synopses" – documents that originally summarized the Apocalypses, but which became the specification for the Perl 6 language. In February 2005,
began work on , a Perl 6 interpreter written in . This was the first concerted effort towards making Perl 6 a reality. This effort stalled in 2006.
On December 18, 2007, the 20th anniversary of Perl 1.0, Perl 5.10.0 was released. Perl 5.10.0 included notable new features, which brought it closer to . These included a
(called "given"/"when"), regular expressions updates, and the smart match operator, "~~". Around this same time, development began in earnest on another implementation of Perl 6 known as , developed in tandem with the . As of November 2009, Rakudo Perl has had regular monthly releases and now is the most complete implementation of .
A major change in the development process of Perl 5 occurred with Perl 5.11; the development community has switched to a monthly release cycle of development releases, with a yearly schedule of stable releases. By that plan, bugfix point releases will follow the stable releases every three months.
On April 12, 2010, Perl 5.12.0 was released. Notable core enhancements include new package NAME VERSION syntax, the Yada Yada operator (intended to mark placeholder code that is not yet implemented), implicit strictures, full
compliance, regex conversion overloading,
support, and
5.2. On January 21, 2011, Perl 5.12.3 it contains updated modules and some documentation changes. Version 5.12.4 was released on June 20, 2011. The latest version of that branch, 5.12.5, was released on November 10, 2012.
On May 14, 2011, Perl 5.14 was released.
support is built-in as of 5.14.0. The latest version of that branch, 5.14.4, was released on March 10, 2013.
On May 20, 2012, Perl 5.16 was released. Notable new features include the ability to specify a given version of Perl that one wishes to emulate, allowing users to upgrade their version of Perl, but still run old scripts that would normally be incompatible. Perl 5.16 also updates the core to support
On May 18, 2013, Perl 5.18 was released. Notable new features include the new dtrace hooks, lexical subs, more CORE:: subs, overhaul of the hash for security reasons, support for Unicode 6.2.
On May 27, 2014, Perl 5.20 was released. Notable new features include subroutine signatures, hash slices/new slice syntax, postfix dereferencing (experimental), Unicode 6.3, rand() using consistent random number generator.
Some observers credit the release of Perl 5.10 with the start of the Modern Perl movement. In particular, this phrase describes a style of development that embraces the use of the CPAN, takes advantage of recent developments in the language, and is rigorous about creating high quality code. While the book "Modern Perl" may be the most visible standard-bearer of this idea, other groups such as the Enlightened Perl Organization have taken up the cause.
In late 2012 and 2013, several projects for alternative implementations for Perl 5 started: Perl5 in
by the Rakudo Perl team, moe by Stevan Little and friends, p2 by the Perl11 team under Reini Urban, gperl by goccy, and rperl a kickstarter project led by Will Braswell and affiliated with the Perll11 project.
PONIE is an acronym for Perl On New Internal Engine. The PONIE Project existed from 2003 until 2006 and was to be a bridge between Perl 5 and . It was an effort to rewrite the Perl 5 interpreter to run on , the Perl 6 virtual machine. The goal was to ensure the future of the millions of lines of Perl 5 code at thousands of companies around the world.
The PONIE project ended in 2006 and is no longer being actively developed. Some of the improvements made to the Perl 5 interpreter as part of PONIE were folded into that project.
Perl was originally named "Pearl". Wall wanted to give the language a short name with p he claims that he considered every three- and four-letter word in the dictionary. He also considered naming it after his wife Gloria. Wall discovered the existing
programming language before Perl's official release and changed the spelling of the name.
When referring to the language, the name is normally capitalized (Perl) as a proper noun. When referring to the interpreter program itself, the name is often uncapitalized (perl) because most Unix-like file systems are case-sensitive. Before the release of the first edition of Programming Perl, it was common to refer to the language as perl; , however, capitalized the language's name in the book to make it stand out better when typeset. This case distinction was subsequently documented as canonical.
The name is occasionally expanded as Practical Extraction and Report Language, but this is a . Other expansions have been suggested as equally canonical, including Wall's own Pathologically Eclectic Rubbish Lister which is in the
for perl. Indeed, Wall claims that the name was intended to inspire many different expansions.
The Camel symbol used by O'Reilly Media
Programming Perl, published by , features a picture of a
on the cover and is commonly called the "Camel Book". This image of a camel has become an unofficial symbol of Perl as well as a general
emblem, appearing on T-shirts and other clothing items.
O'Reilly owns the image as a
but licenses it for
use, requiring only an acknowledgement and a link to www.perl.com. Licensing for commercial use is decided on a case by case basis. O'Reilly also provides "Programming Republic of Perl" logos for non-commercial sites and "Powered by Perl" buttons for any site that uses Perl.
The onion logo used by The Perl Foundation
owns an alternative symbol, an onion, which it licenses to its subsidiaries, , , Perl.org, and others. The symbol is a
Alternative Perl 5 Logo
Sebastian Riedel, the creator of , has created a logo depicting a Raptor, which is available under a CC-SA License, Version 4.0. The logo is being remixed and used in different places and is symbolising Perl 5. The analogue of the raptor comes from a series of talks given by Matt S Trout beginning in 2010. The talks was aimed at being more Perl 5 community centric, in a period where Perl 6 was a hot topic.
According to Wall, Perl has two slogans. The first is "", commonly known as TMTOWTDI. The second slogan is "Easy things should be easy and hard things should be possible".
The overall structure of Perl derives broadly from C. Perl is
in nature, with , , , -delimited , , and .
Perl also takes features from shell programming. All variables are marked with leading , which allow variables to be
directly into . However, unlike the shell, Perl uses sigils on all accesses to variables, and unlike most other programming languages that use sigils, the sigil doesn't denote the type of the variable but the type of the expression. So for example, to access a list of values in a , the sigil for an
("@") is used, not the sigil for a hash ("%"). Perl also has many built-in functions that provide tools often used in shell programming (although many of these tools are implemented by programs external to the shell) such as , and calling
facilities.
Perl takes
("associative arrays") from , and
from . These simplify and facilitate many parsing, text-handling, and data-management tasks. Also shared with Lisp are the implicit
of the last value in a block, and the fact that all statements have a value, and thus are also expressions and can be used in larger expressions themselves.
Perl 5 added features that support complex ,
as values), and an object-oriented programming model. These include , packages, class-based , and , along with
(for example, the strict pragma). A major additional feature introduced with Perl 5 was the ability to package code as reusable modules. Wall later stated that "The whole intent of Perl 5's module system was to encourage the growth of Perl culture rather than the Perl core."
All versions of Perl do automatic
and automatic . The interpreter knows the type and
requirements of every data o it allocates and frees storage for them as necessary using
(so it cannot deallocate
without manual intervention). Legal
— for example, conversions from number to string — are do illegal type conversions are fatal errors.
The design of Perl can be understood as a response to three broad trends in the computer industry: falling hardware costs, rising labor costs, and improvements in
technology. Many earlier computer languages, such as
and C, aimed to make efficient use of expensive computer hardware. In contrast, Perl was designed so that computer programmers could write programs more quickly and easily.
Perl has many features that ease the task of the programmer at the expense of greater
and memory requirements. These include automat ; strings, lists, and an eval() function. Perl follows the theory of "no built-in limits", an idea similar to the
Wall was trained as a linguist, and the design of Perl is very much informed by
principles. Examples include
(common constructions should be short), good end-weighting (the important information should come first), and a large collection of . Perl favors language constructs that are concise and natural for humans to write, even where they complicate the Perl interpreter.
reflects the idea that "things that are different should look different." For example, scalars, arrays, and hashes have different leading sigils. Array indices and hash keys use different kinds of braces. Strings and regular expressions have different standard delimiters. This approach can be contrasted with a language such as , where the same basic syntax, composed of simple and universal , is used for all purposes.
Perl does not enforce any particular
(, , , or others) or even require the programmer to choose among them.
There is a broad practical bent to both the Perl language and the community and culture that surround it. The preface to Programming Perl begins: "Perl is a language for getting your job done." One consequence of this is that Perl is not a tidy language. It includes many features, tolerates exceptions to its rules, and employs
to resolve syntactical ambiguities. Because of the forgiving nature of the compiler, bugs can sometimes be hard to find. Perl's function documentation remarks on the variant behavior of built-in functions in list and scalar contexts by saying, "In general, they do what you want, unless you want consistency."
No written
or standard for the Perl language exists for Perl versions through Perl 5, and there are no plans to create one for the current version of Perl. There has been only one implementation of the interpreter, and the language has evolved along with it. That interpreter, together with its functional tests, stands as a de facto specification of the language. , however, started with a specification, and several projects aim to implement some or all of the specification.
Perl has many and varied applications, compounded by the availability of many standard and third-party modules.
Perl has chiefly been used to write
scripts: large projects written in Perl include , , , , , high-traffic websites that use Perl extensively include , , , , ,
and . It is also an optional component of the popular
technology stack for , in lieu of
Perl is often used as a , tying together systems and interfaces that were not specifically designed to interoperate, and for "", that is, converting or processing large amounts of data for tasks such as creating reports. In fact, these strengths are intimately linked. The combination makes Perl a popular all-purpose language for , particularly because short programs, often called "", can be entered and run on a single .
Perl code can be made portable across
and U such code is often used by suppliers of software (both
and bespoke) to simplify packaging and maintenance of software build- and deployment-scripts.
(GUIs) may be developed using Perl. For example,
are commonly used to enable user interaction with Perl scripts. Such interaction may be synchronous or asynchronous, using
to update the GUI.
Perl is implemented as a core interpreter, written in C, together with a large collection of modules, written in Perl and C. As of 2010, the interpreter is 150,000 lines of C code and compiles to a 1 MB executable on typical machine architectures. Alternatively, the interpreter can be compiled to a link library and embedded in other programs. There are nearly 500 modules in the distribution, comprising 200,000 lines of Perl and an additional 350,000 lines of C code (much of the C code in the modules consists of
The interpreter has an object-oriented architecture. All of the elements of the Perl language—scalars, arrays, hashes, coderefs, —are represented in the interpreter by . Operations on these structs are defined by a large collection of , , these constitute the Perl C . The Perl API can be bewildering to the uninitiated, but its entry points follow a consistent , which provides guidance to those who use it.
The life of a Perl interpreter divides broadly into a compile phase and a run phase. In Perl, the phases are the major stages in the interpreter's life-cycle. Each interpreter goes through each phase only once, and the phases follow in a fixed sequence.
Most of what happens in Perl's compile phase is compilation, and most of what happens in Perl's run phase is execution, but there are significant exceptions. Perl makes important use of its capability to execute Perl code during the compile phase. Perl will also delay compilation into the run phase. The terms that indicate the kind of processing that is actually occurring at any moment are compile time and run time. Perl is in compile time at most points during the compile phase, but compile time may also be entered during the run phase. The compile time for code in a string argument passed to the
built-in occurs during the run phase. Perl is often in run time during the compile phase and spends most of the run phase in run time. Code in BEGIN blocks executes at run time but in the compile phase.
At compile time, the interpreter parses Perl code into a . At run time, it executes the program by . Text is parsed only once, and the syntax tree is subject to optimization before it is executed, so that execution is relatively efficient. Compile-time optimizations on the syntax tree include
and context propagation, but
is also performed.
Perl has a
because parsing can be affected by run-time code executed during the compile phase. Therefore, Perl cannot be parsed by a straight / / combination. Instead, the interpreter implements its own lexer, which coordinates with a modified
parser to resolve ambiguities in the language.
It is often said that "Only perl can parse Perl", meaning that only the Perl interpreter (perl) can parse the Perl language (Perl), but even this is not, in general, true. Because the Perl interpreter can simulate a Turing machine during its compile phase, it would need to decide the
in order to complete parsing in every case. It is a long-standing result that the halting problem is undecidable, and therefore not even perl can always parse Perl. Perl makes the unusual choice of giving the user access to its full programming power in its own compile phase. The cost in terms of theoretical purity is high, but practical inconvenience seems to be rare.
Other programs that undertake to parse Perl, such as
analyzers and , have to contend not only with ambiguous
but also with the
of Perl parsing in the general case. Adam Kennedy's PPI project focused on parsing Perl code as a document (retaining its integrity as a document), instead of parsing Perl as executable code (that not even Perl itself can always do). It was Kennedy who first conjectured that "parsing Perl suffers from the ''", which was later proved.
Perl is distributed with over 250,000
for core Perl language and over 250,000
for core modules. These run as part of the normal build process and extensively exercise the interpreter and its core modules. Perl developers rely on the functional tests to ensure that changes to the interpret additionally, Perl users who see that the interpreter passes its functional tests on their system can have a high degree of confidence that it is working properly.
under both the
1.0 and the . Distributions are available for most . It is particularly prevalent on
systems, but it has been ported to most modern (and many obsolete) platforms. With only six[] reported exceptions, Perl can be compiled from
on all -compliant, or otherwise-Unix-compatible platforms.
Because of unusual changes required for the
environment, a special port called MacPerl was shipped independently.
carries a complete list of supported platforms with links to the distributions available on each. CPAN is also the source for publicly available Perl modules that are not part of the core Perl distribution.
typically install one of the native binary distributions of Perl for Win32, most commonly
or . Compiling Perl from
under Windows is possible, but most installations lack the requisite C compiler and build tools. This also makes it difficult to install modules from the CPAN, particularly those that are partially written in C.
is a closed source distribution from
that has regular releases that track the core Perl releases. The distribution also includes the
(PPM), a popular tool for installing, removing, upgrading, and managing the use of common Perl modules. Included also is , a
(WSH) engine implementing the Perl language.
is an ActiveState tool that adds Perl to the Visual Studio .NET development suite. A
to Perl converter, as well as a Perl compiler for Windows, and converters of
to Perl have also been produced by this company and included on the ActiveState CD for Windows, which includes all of their distributions plus the
and all but the first on the Unix/Linux/Posix variant thereof in 2002 and subsequently.
is an open source distribution for Windows. It has had regular, quarterly releases since January 2008, including new modules as feedback and requests come in. Strawberry Perl aims to be able to install modules like standard Perl distributions on other platforms, including compiling XS modules.
emulation layer is another way of running Perl under Windows. Cygwin provides a Unix-like environment on Windows, and both Perl and CPAN are available as standard pre-compiled packages in the Cygwin setup program. Since Cygwin also includes , compiling Perl from source is also possible.
A perl executable is included in several Windows Resource kits in the directory with other scripting tools.
Implementations of Perl come with the ,
(the base of earlier implementations of , and .
Perl's text-handling capabilities can be used for arrays, hashes, and automatic memory management make it easy to collect and process the returned data. For example, in Tim Bunce's
(API), the arguments to the API can be the text of SQL thus it is possible to program in multiple languages at the same time (e.g., for generating a
using , , and SQL in a ). The use of Perl
to programmatically customize each of the SQL queries, and the specification of Perl arrays or hashes as the structures to programmatically hold the resulting
from each SQL query, allows a high-level mechanism for handling large amounts of data for post-processing by a Perl subprogram. In early versions of Perl, database interfaces were created by relinking the interpreter with a
database library. This was sufficiently difficult that it was done for only a few of the most-important and most widely used databases, and it restricted the resulting perl executable to using just one database interface at a time.
In Perl 5, database interfaces are implemented by
modules. The DBI (Database Interface) module presents a single, database-independent interface to Perl applications, while the DBD (Database Driver) modules handle the details of accessing some 50 there are DBD drivers for most
databases.
DBI provides caching for database handles and queries, which can greatly improve performance in long-lived execution environments such as , helping high-volume systems avert load spikes as in the .
In modern Perl applications, especially those written using
such as , the DBI module is often used indirectly via
that generate SQL queries and handle data transparently to the application author.
compares the performance of implementations of typical programming problems in several programming languages. The submitted Perl implementations typically perform toward the high end of the memory-usage spectrum and give varied speed results. Perl's performance in the benchmarks game is typical for interpreted languages.
Large Perl programs start more slowly than similar programs in compiled languages because perl has to compile the source every time it runs. In a talk at the
conference and subsequent article "A Timely Start", Jean-Louis Leroy found that his Perl programs took much longer to run than expected because the perl interpreter spent significant time finding modules within his over-large include path. Unlike Java, Python, and Ruby, Perl has only experimental support for pre-compiling. Therefore, Perl programs pay this overhead penalty on every execution. The run phase of typical programs is long enough that
startup time is not substantial, but benchmarks that measure very short execution times are likely to be skewed due to this overhead.
A number of tools have been introduced to improve this situation. The first such tool was Apache's , which sought to address one of the most-common reasons that small Perl programs were invoked rapidly:
development. , via Microsoft , provides similar performance improvements.
Once Perl code is compiled, there is additional overhead during the execution phase that typically isn't present for programs written in compiled languages such as C or C++. Examples of such overhead include
interpretation, reference-counting memory management, and dynamic type-checking.
Because Perl is an interpreted language, it can give problems when ef in such situations, the most critical routines can be written in other languages (such as ), which can be connected to Perl via simple Inline modules or the more complex but flexible
mechanism.
Camelia, the logo for the Perl 6 project.
At the 2000 ,
made a case for a major new language-initiative. This led to a decision to begin work on a redesign of the language, to be called Perl 6. Proposals for new language features were solicited from the Perl community at large, which submitted more than 300 .
Wall spent the next few years digesting the RFCs and synthesizing them into a coherent framework for Perl 6. He has presented his design for Perl 6 in a series of documents called "apocalypses" – numbered to correspond to chapters in Programming Perl. As of January 2011, the developing specification of Perl 6 is encapsulated in design documents called Synopses – numbered to correspond to Apocalypses.
Perl 6 is not intended to be backward compatible, although there will be a compatibility mode. Perl 6 and Perl 5 are distinct languages with a common ancestry.
Thesis work by , overseen by Wall, considered the possible use of the
as a runtime for Perl. Kuhn's thesis showed this approach to be problematic. In 2001, it was decided that Perl 6 would run on a cross-language
called . This will mean that other languages targeting the Parrot will gain native access to , allowing some level of cross-language development.
created the
project, an implementation of Perl 6 in . This acted as, and continues to act as, a test platform for the Perl 6 language (separate from the development of the actual implementation) – allowing the language designers to explore. The Pugs project spawned an active Perl/Haskell cross-language community centered around the
#perl6 IRC channel. Many
influences were absorbed by the Perl 6 design team.
In 2012, Perl 6 development was centered primarily around two compilers:
, an implementation running on the
, which targets the .
(“Metamodel On A Runtime”), a C language-based
designed primarily for Rakudo was announced.
As of 2017, only the
implementation,
and support for an other virtual machines, such as the
are under active development.
Development of Perl 5 is also continuing. Perl 5.12.0 was released in April 2010 with some new features influenced by the design of Perl 6, followed by Perl 5.14.1 (released on June 17, 2011), Perl 5.16.1 (released on August 9, 2012.), and Perl 5.18.0 (released on May 18, 2013). Perl 5 development versions are released on a monthly basis, with major releases coming out once per year.
Future plans for Perl 5 include making the core language easier to extend from modules, and providing a small, extensible
The relative proportion of Internet searches for 'Perl programming', as compared with similar searches for other programming languages, steadily declined from about 10% in 2005 to about 2% in 2011, and has remained around the 2% level since.
Perl's culture and community has developed alongside the language itself.
was the first public venue in which Perl was introduced, but over the course of its evolution, Perl's community was shaped by the growth of broadening Internet-based services including the introduction of the World Wide Web. The community that surrounds Perl was, in fact, the topic of Wall's first "State of the Onion" talk.
State of the Onion is the name for Wall’s yearly -style summaries on the progress of Perl and its community. They are characterized by his hallmark humor, employing references to Perl’s culture, the wider hacker culture, Wall’s linguistic background, sometimes his family life, and occasionally even his
background.
Each talk is first given at various Perl conferences and is eventually also published online.
In email, Usenet, and message board postings, "" (JAPH) programs are a common trend, originated by , one of the earliest professional Perl trainers. In the parlance of Perl culture, Perl programmers are known as Perl hackers, and from this derives the practice of writing short programs to print out the phrase "Just another Perl hacker". In the spirit of the original concept, these programs are moderately obfuscated and short enough to fit into the signature of an email or Usenet message. The "canonical" JAPH as developed by Schwartz includes the comma at the end, although this is often omitted.
Perl "golf" is the pastime of reducing the number of characters (key "strokes") used in a Perl program to the bare minimum, much in the same way that
players seek to take as few shots as possible in a round. The phrase's first use emphasized the difference between pedestrian code meant to teach a newcomer and terse hacks likely to amuse experienced Perl programmers, an example of the latter being
that were already used in signatures in Usenet postings and elsewhere. Similar stunts had been an unnamed pastime in the language
in previous decades. The use of Perl to write a program that performed
encryption prompted a widespread and practical interest in this pastime. In subsequent years, the term "" has been applied to the pastime in other languages. A Perl Golf Apocalypse was held at Perl Conference 4.0 in Monterey, California in July 2000.
Obfuscation
As with C,
competitions were a well known pastime in the late 1990s. The
was a competition held by
from 1996 to 2000 that made an arch virtue of Perl's syntactic flexibility. Awards were given for categories such as "most powerful"—programs that made efficient use of space—and "best four-line signature" for programs that fit into four lines of 76 characters in the style of a Usenet .
Perl poetry is the practice of writing poems that can be compiled as legal Perl code, for example the piece known as . Perl poetry is made possible by the large number of English words that are used in the Perl language. New poems are regularly submitted to the community at .
There are a number of
channels that offer support for the language and some modules.
IRC Network
irc.freenode.net
#perl #perl6 #cbstream #perlcafe #poe
irc.perl.org
#moose #poe #catalyst #dbix-class #perl-help #distzilla #epo #corehackers #sdl #win32 #toolchain #padre #dancer
irc.slashnet.org
#perlmonks
irc.oftc.net
irc.efnet.net
irc.rizon.net
irc.debian.org
#debian-perl (packaging Perl modules for Debian)
There are also many examples of code written purely for entertainment on the . Lingua::Romana::Perligata, for example, allows writing programs in . Upon execution of such a program, the module translates its source code into regular Perl and runs it.
The Perl community has set aside the "" namespace for modules that are fun in nature (but its scope has widened to include exploratory or experimental code or any other module that is not meant to ever be used in production). Some of the Acme modules are deliberately implemented in amusing ways. This includes Acme::Bleach, one of the first modules in the Acme:: namespace, which allows the program's source code to be "whitened" (i.e., all characters replaced with whitespace) and yet still work.
In older versions of Perl, one would write the
program as:
print "Hello, World!\n";
In later versions, which support the say statement, one can also write it as:
use 5.010;
say "Hello, World!";
Good Perl practices require more complex programs to add the
, leading into something like:
use strict;
use warnings;
print "Hello, World!\n";
Here is a more complex Perl program, that counts down the seconds up to a given threshold:
#!/usr/bin/perl
use strict;
use warnings;
use IO::Handle;
my ( $remaining, $total );
$remaining = $total = shift(@ARGV);
STDOUT-&autoflush(1);
while ( $remaining ) {
printf ( "Remaining %s/%s \r", $remaining--, $total );
print "\n";
The perl interpreter can also be used for one-off scripts on the command line. The following example (as invoked from an sh-compatible shell, such as Bash) translates the string "Bob" in all files ending with .txt in the current directory to "Robert":
$ perl -i.bak -lp -e 's/Bob/Robert/g' *.txt
Perl has been referred to as "" by some programmers who claim its syntax makes it a . The earliest such mention was in the first edition of the book , a Perl 5 tutorial book written by , in the first chapter of which he states: "Yes, sometimes Perl looks like line noise to the uninitiated, but to the seasoned Perl programmer, it looks like checksummed line noise with a mission in life." He also stated that the accusation that Perl is a write-only language could be avoided by coding with "proper care". The Perl overview document perlintro states that the names of built-in "magic" scalar
"look like punctuation or line noise". The perlstyle document states that line noise in regular expressions could be mitigated using the /x modifier to add whitespace.
According to the Perl 6 FAQ, Perl 6 was designed to mitigate "the usual suspects" that elicit the "line noise" claim from Perl 5 critics, including the removal of "the majority of the punctuation variables" and the sanitization of the regex syntax. The Perl 6 FAQ also states that what is sometimes referred to as Perl's line noise is "the actual syntax of the language" just as
are a part of the . In a December 2012 blog posting, despite claiming that "Rakudo Perl 6 has failed and will continue to fail unless it gets some adult supervision",
stated that the design of Perl 6 has a "well-defined grammar" as well as an "improved type system, a unified object system with an intelligent metamodel, metaoperators, and a clearer system of context that provides for such niceties as pervasive laziness". He also stated that "Perl 6 has a coherence and a consistency that Perl 5 lacks."
. www.nntp.perl.org.
. www.nntp.perl.org.
. www.nntp.perl.org.
. www.nntp.perl.org.
- file on the Perl 5 git repository
. dev.perl.org.
. perl.org. "Perl" is a family of languages, "Perl 6" is part of the family, but it is a separate language that has its own development team. Its existence has no significant impact on the continuing development of "Perl 5".
Lapworth, Leo. . Perl FAQ. Perl.org 2012.
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Sheppard, Doug (). . dev.perl.org.
, Tom Christiansen and
(July 2000). Programming Perl, Third Edition. .  .
. Perl's strongest point is its extremely powerful built-in facilities for pattern-directed processing of textual, line-o it is unsurpassed at this.
. perl has always been the go-to language for any task that involves pattern-matching input
. Perl's unparalleled ability to process text...
Smith, Roderick W. (June 21, 2002). Advanced Linux Networking. Addison-Wesley Professional. p. 594.  .
Sheppard, Doug (). . .
Raymond, Eric (). . The Jargon File.
Leonard, Andrew. . .
Larry Wall (). . : .
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Tang, Audrey (). . .
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(August 23, 2006), , The Perl Foundation
Richardson, Marjorie (). . .
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Trout, Matt (). . Shadowcat Systems Limited.
"title unknown". .  .[]
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DuckDuckGo handles a large amount of search queries at 4.5 million queries per day .
DuckDuckGo uses Perl
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Dave Rolsky (). . .
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Find more aboutPerlat Wikipedia's
from Wiktionary
from Wikimedia Commons
from Wikiquote
from Wikibooks
from Wikiversity
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怎么用Emefotpr打开十六进制
我有更好的答案
二进制的：0.11用75去除8的地数在加小数点，16的同上
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我们会通过消息、邮箱等方式尽快将举报结果通知您。求大神指导一下下面该怎么弄。找到TslGame\Content\Paks过检测的文件最后是ｌ结尾右键Emefotpr以十六进制打开【计算机吧】_百度贴吧
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求大神指导一下下面该怎么弄。找到TslGame\Conten收藏
求大神指导一下下面该怎么弄。找到TslGame\Content\Paks过检测的文件最后是ｌ结尾右键Emefotpr以十六进制打开，50 76 22 F3 97 58 B5 E7
58 B2 DA ED 2A CD BF 4E复制粘贴上面的字符到搜索，删除掉就保存
勤哲Excel服务器学习和下载.会Excel,懂管理,就能做计算机管理信息系统及手机app.软博会金奖产品,适合于各行各业的管理人员使用.
知道怎么弄留个联系方式
楼主能教下吗
50 76 22 F3 97 58 B5 E7
58 B2 DA ED 2A CD BF 4E
这个根本找不到
登录百度帐号推荐应用绝地求生VAC禁封游戏继续上号玩的方法！ - 『精品软件区』
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绝地求生VAC禁封游戏继续上号玩的方法！
阅读权限10
最新跳过VAC进入游戏教程 & && && && && && && && && && && && && && && && && && && && && && && && && &教程一：首先讲解一下Steam和蓝洞游戏的关联，Stame是一个游戏平台，容纳了吃鸡游戏，如果你只是被游戏禁封，那么你的你的Stame任何游戏都能继续，如果你是被Stame禁封那么你，就相当于你游戏从此到了尽头，如今经过不停测试发现了一种办法，可以跳过Stame平台的禁封直接在游戏内部玩游戏 ，而不再会禁封，上号蓝洞的BUG现在附上已经被禁封的VAC账户示例图
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12:22 上传
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12:23 上传
不要质疑辅助的正确性辅助，是绝对安全可靠的，需要注入，
相当于填补ＢＵG的编码才可以，正常运行。下面我们来讲解如何操作修改漏洞。
首先先到C盘中寻找你的Stame文件，怎么寻找，打开你的Stame然后找到吃鸡，游戏属性，浏览本地文件，找到Stame所在
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地然后找到TslGame\Content\Paks过检测的文件最后是ｌ结尾
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12:24 上传
右键Emefotpr以十六进制打开，50 76 22 F3 97 58 B5 E7&&58 B2 DA ED 2A CD BF 4E复制粘贴上面的字符到搜索，
删除掉就保存 上游戏，然后如果游戏运行失败，就登录体验服你就会发现，
游戏可以正常运行，然后你匹配的人也是正版服务器的人,必须使用Steam登录，
登录后登录绝地求生体验服，即可。
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12:25 上传
箭头处即为Steam体验服，登录上去就可以游戏了，与正服没有区别。
& && && && && && && && && && &
& && && && && && && && && && && & 第二种方法& && & 教程二：
把两个DLL文件注入到某盘 steam -----BIN文件夹里面& &
把两个DLL文件注入到某盘&&steam -----BIN文件夹里面& &
注入DLL作用是你进去测试服的时候 转变成正式服必须使用Steam登录，
登录后登录绝地求生体验服，你就会发现& &
你在体验服遇到的事正式服的人& &&&
但是只能单排&&不能双排多排你可以试试& &
不兼容会秒退游戏 账户被封了之后& &
需要换台机子重新注入DLL 再强调一遍进去游戏不是体验服游戏& &&&
是正服只是换种登录方式下边是第二种方式需要的文件链接: https://pan.baidu.com/s/1htvAAAo 密码: 8vzj
吾爱币 +17
热心值 +16
dll注入的考智商呢？hash值跟原文件一样。
热心回复！
谢谢@Thanks！
稳定透视自瞄破解版https://pan.lanzou.com/u/juedifugua
怎么注入？是直接复制还是用软件从注入？
热心回复！
这个我昨天已经放出来了 你确实是能玩 可是我想说你不能和别人组队 也就是.
Emefotpr是什么啊大佬
BIN文件夹？我怎么找到2个bin什么的文件夹？
这么注入？是直接复制到文件夹下？还是需要软件注入，说明白好吗？
我很赞同！
不能跟朋友一起玩 还是买个号吧
怎么注入???
我去试试了~！右键十六进制就是Winhex!~
注入器有没有发一个
吃鸡测试服就算被ban也能上，填个毛线的十六进制，方法2的文件跟steam原来.
搜不到那串代码啊
能不能改改错别字，你那个stame看得我很难受。。
Emefotpr是什么东西= =
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
感觉一群孤儿大军正在来袭，赶紧去试试吧。孤儿们。
素质论坛。
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
Emefotpr 楼主可以共享一下吗？谢谢了
你可以下载安装个UltraEdit& & 然后右键文件 属性& &打开方式 选UltraEdit就好了&&但是我没搜到这串字符
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
Emefotpr这个到底是啥
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
某刀转的。。。。
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
试试 不知道能用不
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
先谢谢了, 马上试一下
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
66666感谢感谢
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
试试能用的说声
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
相反原理，是不是可以用体验服的号玩正服，这样不就相当于改了个名字玩吗
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
马上去试试
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
阅读权限10
网上看见这个教程太多了，图片都是一模一样，还没看见那个评论的成功过.
发帖求助前要善用【】功能，那里可能会有你要找的答案；如果你在论坛求助问题，并且已经从坛友或者管理的回复中解决了问题，请把帖子分类或者标题加上【已解决】；如何回报帮助你解决问题的坛友，一个好办法就是给对方加【热心】和【CB】，加分不会扣除自己的积分，做一个热心并受欢迎的人！
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Comsenz Inc.From Wikipedia, the free encyclopedia
Perl is a family of , , , . The languages in this family include Perl 5 and .
Though Perl is not officially an acronym, there are various
in use, including "Practical
and Reporting Language". Perl was originally developed by
in 1987 as a general-purpose
to make report processing easier. Since then, it has undergone many changes and revisions. , which began as a redesign of Perl 5 in 2000, eventually evolved into a separate language. Both languages continue to be developed independently by different development teams and liberally borrow ideas from one another.
The Perl languages borrow features from other programming languages including ,
(), , Wall also alludes to
in the introduction to
(Schwartz & Christiansen) and so on.
They provide powerful text processing facilities without the arbitrary data-length limits of many contemporary , facilitating easy manipulation of . Perl 5 gained widespread popularity in the late 1990s as a
language, in part due to its then unsurpassed
abilities.
In addition to CGI, Perl 5 is used for , , finance, , and other applications, such as for . It has been nicknamed "the Swiss Army chainsaw of scripting languages" because of its flexibility and power, and also its ugliness. In 1998, it was also referred to as the " that holds the Internet together", in reference to both its ubiquitous use as a
and its perceived inelegance.
began work on Perl in 1987, while working as a programmer at , and released version 1.0 to the comp.sources.misc
on December 18, 1987. The language expanded rapidly over the next few years.
Perl 2, released in 1988, featured a better regular expression engine. Perl 3, released in 1989, added support for
Originally, the only documentation for Perl was a single lengthy . In 1991, , known to many Perl programmers as the "Camel Book" because of its cover, was published and became the de facto reference for the language. At the same time, the Perl version number was bumped to 4, not to mark a major change in the language but to identify the version that was well documented by the book.
Perl 4 went through a series of , culminating in Perl 4.036 in 1993. At that point, Wall abandoned Perl 4 to begin work on Perl 5. Initial design of Perl 5 continued into 1994. The perl5-porters
was established in May 1994 to coordinate work on porting Perl 5 to different platforms. It remains the primary forum for development, maintenance, and porting of Perl 5.
Perl 5.000 was released on October 17, 1994. It was a nearly complete rewrite of the , and it added many new features to the language, including , , , and . Importantly, modules provided a mechanism for extending the language without modifying the interpreter. This allowed the core interpreter to stabilize, even as it enabled ordinary Perl programmers to add new language features. Perl 5 has been in active development since then.
Perl 5.001 was released on March 13, 1995. Perl 5.002 was released on February 29, 1996 with the new prototypes feature. This allowed module authors to make
that behaved like Perl . Perl 5.003 was released June 25, 1996, as a security release.
One of the most important events in Perl 5 history took place outside of the language proper and was a consequence of its module support. On October 26, 1995, the
(CPAN) was established as a
and P as of May 2017, it carries over 185,178 modules in 35,190 distributions, written by more than 13,071 authors, and is mirrored worldwide at more than 245 locations.
Perl 5.004 was released on May 15, 1997, and included among other things the UNIVERSAL package, giving Perl a base object to which all
were automatically derived and the ability to require versions of modules. Another significant development was the inclusion of the
module, which contributed to Perl's popularity as a .
Perl is also now supported running under
and several other operating systems.
Perl 5.005 was released on July 22, 1998. This release included several enhancements to the
engine, new hooks into the backend through the B::* modules, the qr// regex quote operator, a large selection of other new core modules, and added support for several more operating systems, including .
Major version
Latest update
Old version, no longer supported: 5.5
Old version, no longer supported: 5.6
Old version, no longer supported: 5.8
Old version, no longer supported: 5.10
Old version, no longer supported: 5.12
Old version, no longer supported: 5.14
Old version, no longer supported: 5.16
Old version, no longer supported: 5.18
Old version, no longer supported: 5.20
Old version, no longer supported: 5.22
Older version, yet still supported: 5.24
Current stable version: 5.26
Legend:Old versionOlder version, still supportedCurrent stable versionLatest preview versionFuture release
Perl 5.6 was released on March 22, 2000. Major changes included
string representation, support for files over 2 GiB, and the "our" keyword. When developing Perl 5.6, the decision was made to switch the
scheme to one more similar to other
after 5.005_63, the next version became 5.5.640, with plans for development versions to have odd numbers and stable versions to have even numbers.
In 2000, Wall put forth a call for suggestions for a new version of Perl from the community. The process resulted in 361 RFC (request for comments) documents that were to be used in guiding development of Perl 6. In 2001, work began on the "Apocalypses" for , a series of documents meant to summarize the change requests and present the design of the next generation of Perl. They were presented as a digest of the RFCs, rather than a formal document. At this point, Perl 6 existed only as a description of a language.
Perl 5.8 was first released on July 18, 2002, and had nearly yearly updates since then. Perl 5.8 improved Unicode support, added a new I/O implementation, added a new thread implementation, improved numeric accuracy, and added several new modules. As of 2013 this version still remains the most popular version of Perl and is used by Red Hat 5, Suse 10, Solaris 10, HP-UX 11.31 and AIX 5.
In 2004, work began on the "Synopses" – documents that originally summarized the Apocalypses, but which became the specification for the Perl 6 language. In February 2005,
began work on , a Perl 6 interpreter written in . This was the first concerted effort towards making Perl 6 a reality. This effort stalled in 2006.
On December 18, 2007, the 20th anniversary of Perl 1.0, Perl 5.10.0 was released. Perl 5.10.0 included notable new features, which brought it closer to . These included a
(called "given"/"when"), regular expressions updates, and the smart match operator, "~~". Around this same time, development began in earnest on another implementation of Perl 6 known as , developed in tandem with the . As of November 2009, Rakudo Perl has had regular monthly releases and now is the most complete implementation of .
A major change in the development process of Perl 5 occurred with Perl 5.11; the development community has switched to a monthly release cycle of development releases, with a yearly schedule of stable releases. By that plan, bugfix point releases will follow the stable releases every three months.
On April 12, 2010, Perl 5.12.0 was released. Notable core enhancements include new package NAME VERSION syntax, the Yada Yada operator (intended to mark placeholder code that is not yet implemented), implicit strictures, full
compliance, regex conversion overloading,
support, and
5.2. On January 21, 2011, Perl 5.12.3 it contains updated modules and some documentation changes. Version 5.12.4 was released on June 20, 2011. The latest version of that branch, 5.12.5, was released on November 10, 2012.
On May 14, 2011, Perl 5.14 was released.
support is built-in as of 5.14.0. The latest version of that branch, 5.14.4, was released on March 10, 2013.
On May 20, 2012, Perl 5.16 was released. Notable new features include the ability to specify a given version of Perl that one wishes to emulate, allowing users to upgrade their version of Perl, but still run old scripts that would normally be incompatible. Perl 5.16 also updates the core to support
On May 18, 2013, Perl 5.18 was released. Notable new features include the new dtrace hooks, lexical subs, more CORE:: subs, overhaul of the hash for security reasons, support for Unicode 6.2.
On May 27, 2014, Perl 5.20 was released. Notable new features include subroutine signatures, hash slices/new slice syntax, postfix dereferencing (experimental), Unicode 6.3, rand() using consistent random number generator.
Some observers credit the release of Perl 5.10 with the start of the Modern Perl movement. In particular, this phrase describes a style of development that embraces the use of the CPAN, takes advantage of recent developments in the language, and is rigorous about creating high quality code. While the book "Modern Perl" may be the most visible standard-bearer of this idea, other groups such as the Enlightened Perl Organization have taken up the cause.
In late 2012 and 2013, several projects for alternative implementations for Perl 5 started: Perl5 in
by the Rakudo Perl team, moe by Stevan Little and friends, p2 by the Perl11 team under Reini Urban, gperl by goccy, and rperl a kickstarter project led by Will Braswell and affiliated with the Perll11 project.
PONIE is an acronym for Perl On New Internal Engine. The PONIE Project existed from 2003 until 2006 and was to be a bridge between Perl 5 and . It was an effort to rewrite the Perl 5 interpreter to run on , the Perl 6 virtual machine. The goal was to ensure the future of the millions of lines of Perl 5 code at thousands of companies around the world.
The PONIE project ended in 2006 and is no longer being actively developed. Some of the improvements made to the Perl 5 interpreter as part of PONIE were folded into that project.
Perl was originally named "Pearl". Wall wanted to give the language a short name with p he claims that he considered every three- and four-letter word in the dictionary. He also considered naming it after his wife Gloria. Wall discovered the existing
programming language before Perl's official release and changed the spelling of the name.
When referring to the language, the name is normally capitalized (Perl) as a proper noun. When referring to the interpreter program itself, the name is often uncapitalized (perl) because most Unix-like file systems are case-sensitive. Before the release of the first edition of Programming Perl, it was common to refer to the language as perl; , however, capitalized the language's name in the book to make it stand out better when typeset. This case distinction was subsequently documented as canonical.
The name is occasionally expanded as Practical Extraction and Report Language, but this is a . Other expansions have been suggested as equally canonical, including Wall's own Pathologically Eclectic Rubbish Lister which is in the
for perl. Indeed, Wall claims that the name was intended to inspire many different expansions.
The Camel symbol used by O'Reilly Media
Programming Perl, published by , features a picture of a
on the cover and is commonly called the "Camel Book". This image of a camel has become an unofficial symbol of Perl as well as a general
emblem, appearing on T-shirts and other clothing items.
O'Reilly owns the image as a
but licenses it for
use, requiring only an acknowledgement and a link to www.perl.com. Licensing for commercial use is decided on a case by case basis. O'Reilly also provides "Programming Republic of Perl" logos for non-commercial sites and "Powered by Perl" buttons for any site that uses Perl.
The onion logo used by The Perl Foundation
owns an alternative symbol, an onion, which it licenses to its subsidiaries, , , Perl.org, and others. The symbol is a
Alternative Perl 5 Logo
Sebastian Riedel, the creator of , has created a logo depicting a Raptor, which is available under a CC-SA License, Version 4.0. The logo is being remixed and used in different places and is symbolising Perl 5. The analogue of the raptor comes from a series of talks given by Matt S Trout beginning in 2010. The talks was aimed at being more Perl 5 community centric, in a period where Perl 6 was a hot topic.
According to Wall, Perl has two slogans. The first is "", commonly known as TMTOWTDI. The second slogan is "Easy things should be easy and hard things should be possible".
The overall structure of Perl derives broadly from C. Perl is
in nature, with , , , -delimited , , and .
Perl also takes features from shell programming. All variables are marked with leading , which allow variables to be
directly into . However, unlike the shell, Perl uses sigils on all accesses to variables, and unlike most other programming languages that use sigils, the sigil doesn't denote the type of the variable but the type of the expression. So for example, to access a list of values in a , the sigil for an
("@") is used, not the sigil for a hash ("%"). Perl also has many built-in functions that provide tools often used in shell programming (although many of these tools are implemented by programs external to the shell) such as , and calling
facilities.
Perl takes
("associative arrays") from , and
from . These simplify and facilitate many parsing, text-handling, and data-management tasks. Also shared with Lisp are the implicit
of the last value in a block, and the fact that all statements have a value, and thus are also expressions and can be used in larger expressions themselves.
Perl 5 added features that support complex ,
as values), and an object-oriented programming model. These include , packages, class-based , and , along with
(for example, the strict pragma). A major additional feature introduced with Perl 5 was the ability to package code as reusable modules. Wall later stated that "The whole intent of Perl 5's module system was to encourage the growth of Perl culture rather than the Perl core."
All versions of Perl do automatic
and automatic . The interpreter knows the type and
requirements of every data o it allocates and frees storage for them as necessary using
(so it cannot deallocate
without manual intervention). Legal
— for example, conversions from number to string — are do illegal type conversions are fatal errors.
The design of Perl can be understood as a response to three broad trends in the computer industry: falling hardware costs, rising labor costs, and improvements in
technology. Many earlier computer languages, such as
and C, aimed to make efficient use of expensive computer hardware. In contrast, Perl was designed so that computer programmers could write programs more quickly and easily.
Perl has many features that ease the task of the programmer at the expense of greater
and memory requirements. These include automat ; strings, lists, and an eval() function. Perl follows the theory of "no built-in limits", an idea similar to the
Wall was trained as a linguist, and the design of Perl is very much informed by
principles. Examples include
(common constructions should be short), good end-weighting (the important information should come first), and a large collection of . Perl favors language constructs that are concise and natural for humans to write, even where they complicate the Perl interpreter.
reflects the idea that "things that are different should look different." For example, scalars, arrays, and hashes have different leading sigils. Array indices and hash keys use different kinds of braces. Strings and regular expressions have different standard delimiters. This approach can be contrasted with a language such as , where the same basic syntax, composed of simple and universal , is used for all purposes.
Perl does not enforce any particular
(, , , or others) or even require the programmer to choose among them.
There is a broad practical bent to both the Perl language and the community and culture that surround it. The preface to Programming Perl begins: "Perl is a language for getting your job done." One consequence of this is that Perl is not a tidy language. It includes many features, tolerates exceptions to its rules, and employs
to resolve syntactical ambiguities. Because of the forgiving nature of the compiler, bugs can sometimes be hard to find. Perl's function documentation remarks on the variant behavior of built-in functions in list and scalar contexts by saying, "In general, they do what you want, unless you want consistency."
No written
or standard for the Perl language exists for Perl versions through Perl 5, and there are no plans to create one for the current version of Perl. There has been only one implementation of the interpreter, and the language has evolved along with it. That interpreter, together with its functional tests, stands as a de facto specification of the language. , however, started with a specification, and several projects aim to implement some or all of the specification.
Perl has many and varied applications, compounded by the availability of many standard and third-party modules.
Perl has chiefly been used to write
scripts: large projects written in Perl include , , , , , high-traffic websites that use Perl extensively include , , , , ,
and . It is also an optional component of the popular
technology stack for , in lieu of
Perl is often used as a , tying together systems and interfaces that were not specifically designed to interoperate, and for "", that is, converting or processing large amounts of data for tasks such as creating reports. In fact, these strengths are intimately linked. The combination makes Perl a popular all-purpose language for , particularly because short programs, often called "", can be entered and run on a single .
Perl code can be made portable across
and U such code is often used by suppliers of software (both
and bespoke) to simplify packaging and maintenance of software build- and deployment-scripts.
(GUIs) may be developed using Perl. For example,
are commonly used to enable user interaction with Perl scripts. Such interaction may be synchronous or asynchronous, using
to update the GUI.
Perl is implemented as a core interpreter, written in C, together with a large collection of modules, written in Perl and C. As of 2010, the interpreter is 150,000 lines of C code and compiles to a 1 MB executable on typical machine architectures. Alternatively, the interpreter can be compiled to a link library and embedded in other programs. There are nearly 500 modules in the distribution, comprising 200,000 lines of Perl and an additional 350,000 lines of C code (much of the C code in the modules consists of
The interpreter has an object-oriented architecture. All of the elements of the Perl language—scalars, arrays, hashes, coderefs, —are represented in the interpreter by . Operations on these structs are defined by a large collection of , , these constitute the Perl C . The Perl API can be bewildering to the uninitiated, but its entry points follow a consistent , which provides guidance to those who use it.
The life of a Perl interpreter divides broadly into a compile phase and a run phase. In Perl, the phases are the major stages in the interpreter's life-cycle. Each interpreter goes through each phase only once, and the phases follow in a fixed sequence.
Most of what happens in Perl's compile phase is compilation, and most of what happens in Perl's run phase is execution, but there are significant exceptions. Perl makes important use of its capability to execute Perl code during the compile phase. Perl will also delay compilation into the run phase. The terms that indicate the kind of processing that is actually occurring at any moment are compile time and run time. Perl is in compile time at most points during the compile phase, but compile time may also be entered during the run phase. The compile time for code in a string argument passed to the
built-in occurs during the run phase. Perl is often in run time during the compile phase and spends most of the run phase in run time. Code in BEGIN blocks executes at run time but in the compile phase.
At compile time, the interpreter parses Perl code into a . At run time, it executes the program by . Text is parsed only once, and the syntax tree is subject to optimization before it is executed, so that execution is relatively efficient. Compile-time optimizations on the syntax tree include
and context propagation, but
is also performed.
Perl has a
because parsing can be affected by run-time code executed during the compile phase. Therefore, Perl cannot be parsed by a straight / / combination. Instead, the interpreter implements its own lexer, which coordinates with a modified
parser to resolve ambiguities in the language.
It is often said that "Only perl can parse Perl", meaning that only the Perl interpreter (perl) can parse the Perl language (Perl), but even this is not, in general, true. Because the Perl interpreter can simulate a Turing machine during its compile phase, it would need to decide the
in order to complete parsing in every case. It is a long-standing result that the halting problem is undecidable, and therefore not even perl can always parse Perl. Perl makes the unusual choice of giving the user access to its full programming power in its own compile phase. The cost in terms of theoretical purity is high, but practical inconvenience seems to be rare.
Other programs that undertake to parse Perl, such as
analyzers and , have to contend not only with ambiguous
but also with the
of Perl parsing in the general case. Adam Kennedy's PPI project focused on parsing Perl code as a document (retaining its integrity as a document), instead of parsing Perl as executable code (that not even Perl itself can always do). It was Kennedy who first conjectured that "parsing Perl suffers from the ''", which was later proved.
Perl is distributed with over 250,000
for core Perl language and over 250,000
for core modules. These run as part of the normal build process and extensively exercise the interpreter and its core modules. Perl developers rely on the functional tests to ensure that changes to the interpret additionally, Perl users who see that the interpreter passes its functional tests on their system can have a high degree of confidence that it is working properly.
under both the
1.0 and the . Distributions are available for most . It is particularly prevalent on
systems, but it has been ported to most modern (and many obsolete) platforms. With only six[] reported exceptions, Perl can be compiled from
on all -compliant, or otherwise-Unix-compatible platforms.
Because of unusual changes required for the
environment, a special port called MacPerl was shipped independently.
carries a complete list of supported platforms with links to the distributions available on each. CPAN is also the source for publicly available Perl modules that are not part of the core Perl distribution.
typically install one of the native binary distributions of Perl for Win32, most commonly
or . Compiling Perl from
under Windows is possible, but most installations lack the requisite C compiler and build tools. This also makes it difficult to install modules from the CPAN, particularly those that are partially written in C.
is a closed source distribution from
that has regular releases that track the core Perl releases. The distribution also includes the
(PPM), a popular tool for installing, removing, upgrading, and managing the use of common Perl modules. Included also is , a
(WSH) engine implementing the Perl language.
is an ActiveState tool that adds Perl to the Visual Studio .NET development suite. A
to Perl converter, as well as a Perl compiler for Windows, and converters of
to Perl have also been produced by this company and included on the ActiveState CD for Windows, which includes all of their distributions plus the
and all but the first on the Unix/Linux/Posix variant thereof in 2002 and subsequently.
is an open source distribution for Windows. It has had regular, quarterly releases since January 2008, including new modules as feedback and requests come in. Strawberry Perl aims to be able to install modules like standard Perl distributions on other platforms, including compiling XS modules.
emulation layer is another way of running Perl under Windows. Cygwin provides a Unix-like environment on Windows, and both Perl and CPAN are available as standard pre-compiled packages in the Cygwin setup program. Since Cygwin also includes , compiling Perl from source is also possible.
A perl executable is included in several Windows Resource kits in the directory with other scripting tools.
Implementations of Perl come with the ,
(the base of earlier implementations of , and .
Perl's text-handling capabilities can be used for arrays, hashes, and automatic memory management make it easy to collect and process the returned data. For example, in Tim Bunce's
(API), the arguments to the API can be the text of SQL thus it is possible to program in multiple languages at the same time (e.g., for generating a
using , , and SQL in a ). The use of Perl
to programmatically customize each of the SQL queries, and the specification of Perl arrays or hashes as the structures to programmatically hold the resulting
from each SQL query, allows a high-level mechanism for handling large amounts of data for post-processing by a Perl subprogram. In early versions of Perl, database interfaces were created by relinking the interpreter with a
database library. This was sufficiently difficult that it was done for only a few of the most-important and most widely used databases, and it restricted the resulting perl executable to using just one database interface at a time.
In Perl 5, database interfaces are implemented by
modules. The DBI (Database Interface) module presents a single, database-independent interface to Perl applications, while the DBD (Database Driver) modules handle the details of accessing some 50 there are DBD drivers for most
databases.
DBI provides caching for database handles and queries, which can greatly improve performance in long-lived execution environments such as , helping high-volume systems avert load spikes as in the .
In modern Perl applications, especially those written using
such as , the DBI module is often used indirectly via
that generate SQL queries and handle data transparently to the application author.
compares the performance of implementations of typical programming problems in several programming languages. The submitted Perl implementations typically perform toward the high end of the memory-usage spectrum and give varied speed results. Perl's performance in the benchmarks game is typical for interpreted languages.
Large Perl programs start more slowly than similar programs in compiled languages because perl has to compile the source every time it runs. In a talk at the
conference and subsequent article "A Timely Start", Jean-Louis Leroy found that his Perl programs took much longer to run than expected because the perl interpreter spent significant time finding modules within his over-large include path. Unlike Java, Python, and Ruby, Perl has only experimental support for pre-compiling. Therefore, Perl programs pay this overhead penalty on every execution. The run phase of typical programs is long enough that
startup time is not substantial, but benchmarks that measure very short execution times are likely to be skewed due to this overhead.
A number of tools have been introduced to improve this situation. The first such tool was Apache's , which sought to address one of the most-common reasons that small Perl programs were invoked rapidly:
development. , via Microsoft , provides similar performance improvements.
Once Perl code is compiled, there is additional overhead during the execution phase that typically isn't present for programs written in compiled languages such as C or C++. Examples of such overhead include
interpretation, reference-counting memory management, and dynamic type-checking.
Because Perl is an interpreted language, it can give problems when ef in such situations, the most critical routines can be written in other languages (such as ), which can be connected to Perl via simple Inline modules or the more complex but flexible
mechanism.
Camelia, the logo for the Perl 6 project.
At the 2000 ,
made a case for a major new language-initiative. This led to a decision to begin work on a redesign of the language, to be called Perl 6. Proposals for new language features were solicited from the Perl community at large, which submitted more than 300 .
Wall spent the next few years digesting the RFCs and synthesizing them into a coherent framework for Perl 6. He has presented his design for Perl 6 in a series of documents called "apocalypses" – numbered to correspond to chapters in Programming Perl. As of January 2011, the developing specification of Perl 6 is encapsulated in design documents called Synopses – numbered to correspond to Apocalypses.
Perl 6 is not intended to be backward compatible, although there will be a compatibility mode. Perl 6 and Perl 5 are distinct languages with a common ancestry.
Thesis work by , overseen by Wall, considered the possible use of the
as a runtime for Perl. Kuhn's thesis showed this approach to be problematic. In 2001, it was decided that Perl 6 would run on a cross-language
called . This will mean that other languages targeting the Parrot will gain native access to , allowing some level of cross-language development.
created the
project, an implementation of Perl 6 in . This acted as, and continues to act as, a test platform for the Perl 6 language (separate from the development of the actual implementation) – allowing the language designers to explore. The Pugs project spawned an active Perl/Haskell cross-language community centered around the
#perl6 IRC channel. Many
influences were absorbed by the Perl 6 design team.
In 2012, Perl 6 development was centered primarily around two compilers:
, an implementation running on the
, which targets the .
(“Metamodel On A Runtime”), a C language-based
designed primarily for Rakudo was announced.
As of 2017, only the
implementation,
and support for an other virtual machines, such as the
are under active development.
Development of Perl 5 is also continuing. Perl 5.12.0 was released in April 2010 with some new features influenced by the design of Perl 6, followed by Perl 5.14.1 (released on June 17, 2011), Perl 5.16.1 (released on August 9, 2012.), and Perl 5.18.0 (released on May 18, 2013). Perl 5 development versions are released on a monthly basis, with major releases coming out once per year.
Future plans for Perl 5 include making the core language easier to extend from modules, and providing a small, extensible
The relative proportion of Internet searches for 'Perl programming', as compared with similar searches for other programming languages, steadily declined from about 10% in 2005 to about 2% in 2011, and has remained around the 2% level since.
Perl's culture and community has developed alongside the language itself.
was the first public venue in which Perl was introduced, but over the course of its evolution, Perl's community was shaped by the growth of broadening Internet-based services including the introduction of the World Wide Web. The community that surrounds Perl was, in fact, the topic of Wall's first "State of the Onion" talk.
State of the Onion is the name for Wall’s yearly -style summaries on the progress of Perl and its community. They are characterized by his hallmark humor, employing references to Perl’s culture, the wider hacker culture, Wall’s linguistic background, sometimes his family life, and occasionally even his
background.
Each talk is first given at various Perl conferences and is eventually also published online.
In email, Usenet, and message board postings, "" (JAPH) programs are a common trend, originated by , one of the earliest professional Perl trainers. In the parlance of Perl culture, Perl programmers are known as Perl hackers, and from this derives the practice of writing short programs to print out the phrase "Just another Perl hacker". In the spirit of the original concept, these programs are moderately obfuscated and short enough to fit into the signature of an email or Usenet message. The "canonical" JAPH as developed by Schwartz includes the comma at the end, although this is often omitted.
Perl "golf" is the pastime of reducing the number of characters (key "strokes") used in a Perl program to the bare minimum, much in the same way that
players seek to take as few shots as possible in a round. The phrase's first use emphasized the difference between pedestrian code meant to teach a newcomer and terse hacks likely to amuse experienced Perl programmers, an example of the latter being
that were already used in signatures in Usenet postings and elsewhere. Similar stunts had been an unnamed pastime in the language
in previous decades. The use of Perl to write a program that performed
encryption prompted a widespread and practical interest in this pastime. In subsequent years, the term "" has been applied to the pastime in other languages. A Perl Golf Apocalypse was held at Perl Conference 4.0 in Monterey, California in July 2000.
Obfuscation
As with C,
competitions were a well known pastime in the late 1990s. The
was a competition held by
from 1996 to 2000 that made an arch virtue of Perl's syntactic flexibility. Awards were given for categories such as "most powerful"—programs that made efficient use of space—and "best four-line signature" for programs that fit into four lines of 76 characters in the style of a Usenet .
Perl poetry is the practice of writing poems that can be compiled as legal Perl code, for example the piece known as . Perl poetry is made possible by the large number of English words that are used in the Perl language. New poems are regularly submitted to the community at .
There are a number of
channels that offer support for the language and some modules.
IRC Network
irc.freenode.net
#perl #perl6 #cbstream #perlcafe #poe
irc.perl.org
#moose #poe #catalyst #dbix-class #perl-help #distzilla #epo #corehackers #sdl #win32 #toolchain #padre #dancer
irc.slashnet.org
#perlmonks
irc.oftc.net
irc.efnet.net
irc.rizon.net
irc.debian.org
#debian-perl (packaging Perl modules for Debian)
There are also many examples of code written purely for entertainment on the . Lingua::Romana::Perligata, for example, allows writing programs in . Upon execution of such a program, the module translates its source code into regular Perl and runs it.
The Perl community has set aside the "" namespace for modules that are fun in nature (but its scope has widened to include exploratory or experimental code or any other module that is not meant to ever be used in production). Some of the Acme modules are deliberately implemented in amusing ways. This includes Acme::Bleach, one of the first modules in the Acme:: namespace, which allows the program's source code to be "whitened" (i.e., all characters replaced with whitespace) and yet still work.
In older versions of Perl, one would write the
program as:
print "Hello, World!\n";
In later versions, which support the say statement, one can also write it as:
use 5.010;
say "Hello, World!";
Good Perl practices require more complex programs to add the
, leading into something like:
use strict;
use warnings;
print "Hello, World!\n";
Here is a more complex Perl program, that counts down the seconds up to a given threshold:
#!/usr/bin/perl
use strict;
use warnings;
use IO::Handle;
my ( $remaining, $total );
$remaining = $total = shift(@ARGV);
STDOUT-&autoflush(1);
while ( $remaining ) {
printf ( "Remaining %s/%s \r", $remaining--, $total );
print "\n";
The perl interpreter can also be used for one-off scripts on the command line. The following example (as invoked from an sh-compatible shell, such as Bash) translates the string "Bob" in all files ending with .txt in the current directory to "Robert":
$ perl -i.bak -lp -e 's/Bob/Robert/g' *.txt
Perl has been referred to as "" by some programmers who claim its syntax makes it a . The earliest such mention was in the first edition of the book , a Perl 5 tutorial book written by , in the first chapter of which he states: "Yes, sometimes Perl looks like line noise to the uninitiated, but to the seasoned Perl programmer, it looks like checksummed line noise with a mission in life." He also stated that the accusation that Perl is a write-only language could be avoided by coding with "proper care". The Perl overview document perlintro states that the names of built-in "magic" scalar
"look like punctuation or line noise". The perlstyle document states that line noise in regular expressions could be mitigated using the /x modifier to add whitespace.
According to the Perl 6 FAQ, Perl 6 was designed to mitigate "the usual suspects" that elicit the "line noise" claim from Perl 5 critics, including the removal of "the majority of the punctuation variables" and the sanitization of the regex syntax. The Perl 6 FAQ also states that what is sometimes referred to as Perl's line noise is "the actual syntax of the language" just as
are a part of the . In a December 2012 blog posting, despite claiming that "Rakudo Perl 6 has failed and will continue to fail unless it gets some adult supervision",
stated that the design of Perl 6 has a "well-defined grammar" as well as an "improved type system, a unified object system with an intelligent metamodel, metaoperators, and a clearer system of context that provides for such niceties as pervasive laziness". He also stated that "Perl 6 has a coherence and a consistency that Perl 5 lacks."
. www.nntp.perl.org.
. www.nntp.perl.org.
. www.nntp.perl.org.
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- file on the Perl 5 git repository
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. perl.org. "Perl" is a family of languages, "Perl 6" is part of the family, but it is a separate language that has its own development team. Its existence has no significant impact on the continuing development of "Perl 5".
Lapworth, Leo. . Perl FAQ. Perl.org 2012.
. Linux.die.net.
Sheppard, Doug (). . dev.perl.org.
, Tom Christiansen and
(July 2000). Programming Perl, Third Edition. .  .
. Perl's strongest point is its extremely powerful built-in facilities for pattern-directed processing of textual, line-o it is unsurpassed at this.
. perl has always been the go-to language for any task that involves pattern-matching input
. Perl's unparalleled ability to process text...
Smith, Roderick W. (June 21, 2002). Advanced Linux Networking. Addison-Wesley Professional. p. 594.  .
Sheppard, Doug (). . .
Raymond, Eric (). . The Jargon File.
Leonard, Andrew. . .
Larry Wall (). . : .
. perl.org.
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Patwardhan, N Siever, E Spainhour, Stephen (2002). Perl in a Nutshell, Second Edition. O'Reilly Media.  .
. Perl 5 version 12.2 documentation. perldoc.perl.org.
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Tang, Audrey (). . .
. Perl 5 version 12.2 documentation. perldoc.perl.org.
. Perl 5 version 12.2 documentation. perldoc.perl.org.
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Little, Stevan (). . Blogs.perl.org.
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Geoff Broadwell (August 8, 2005), , O'Reilly ONLamp Blog
(August 23, 2006), , The Perl Foundation
Richardson, Marjorie (). . .
. perldoc.perl.org - Perl 5 version 12.2 documentation.
; ; Phoenix, Tom (June 16, 2011). Learning Perl. O'Reilly Media, Inc. p. 4.  . Perl is sometimes called the "Practical Extraction and Report Language," although it has also been called a "Pathologically Eclectic Rubbish Lister," among other expansions. It's actually a backronym, not an acronym, since Larry Wall, Perl’s creator, came up with the name first and the expansion later. That’s why "Perl" isn’t in all caps. There's no point in arguing that expansion is correct: Larry endorses both.
. . Perl 5 version 12.2 documentation.
; Phoenix, T . Learning Perl, Third Edition.  .
Gillmore, Dan (). . Chicago Tribune.
Riedel, Sebastian (). . Sebastian Riedel.
Trout, Matt (). . Shadowcat Systems Limited.
"title unknown". .  .[]
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DuckDuckGo handles a large amount of search queries at 4.5 million queries per day .
DuckDuckGo uses Perl
. Perl.org 2010.
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and . Perl "time" and "phase" are often confused.
Kennedy, Adam (2006). . .
"Rice's Theorem". The Perl Review. 4 (3): 23–29. Summer 2008. and "Perl is Undecidable". The Perl Review. 5 (0): 7–11. Fall 2008., available online at Kegler, Jeffrey. .
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