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Regular Expression Flavor Comparison – Detailed comparison of the most popular regular expression flavors; Regexp Syntax Summary; Online Regular Expression Testing – with support for Java, JavaScript, .Net, PHP, Python and Ruby; Implementing Regular Expressions – series of articles by Russ Cox, author of RE2; Regular Expression Engines
Their development typically involves server-side coding, client-side coding and database technology. The programming languages applied to deliver such dynamic web content vary vastly between sites. Programming languages used in most popular websites*
Python for Beginners. New Age International (P) Ltd. ISBN 978-93-86649-49-2. Tim Hall and J-P Stacey (2009). Python 3 for Absolute Beginners. Apress Berkeley, CA. ISBN 978-1-4302-1632-2. Books on PHP that recommend and/or cover the use of Bluefish: Bacon, Jono (2007). Practical PHP and MySQL : building eight dynamic web applications. Prentice Hall.
A regular expression (shortened as regex or regexp), [1] sometimes referred to as rational expression, [2] [3] is a sequence of characters that specifies a match pattern in text. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings , or for input validation .
PHP >= 5.3.6 Any Yes Push Yes Yes Unit tests, builtin test framework or other independent No Yes, Plugins available PHP, Twig Plugin available Memcache, Redis, XCache, APC, File Yes, with CSRF Protection and Form Signing No Yes ? Phalcon: PHP >= 8.0 [90] Any Yes Push Yes Yes Codeception PHPUnit: Yes Yes Volt, PHP
As of 21 January 2025 (two months after PHP 8.4's release), PHP is used as the server-side programming language on 75.0% of websites where the language could be determined; PHP 7 is the most used version of the language with 47.1% of websites using PHP being on that version, while 40.6% use PHP 8, 12.2% use PHP 5 and 0.1% use PHP 4.
In computer science, Thompson's construction algorithm, also called the McNaughton–Yamada–Thompson algorithm, [1] is a method of transforming a regular expression into an equivalent nondeterministic finite automaton (NFA). [2] This NFA can be used to match strings against the regular expression.
[2] [3] [4] It was created in 2008 by Jeff Atwood and Joel Spolsky. [5] [6] It features questions and answers on certain computer programming topics. [7] [8] [9] It was created to be a more open alternative to earlier question and answer websites such as Experts-Exchange.