What is the Perl-compatible regular expressions (PCRE) engine ?

Regexp

About

Perl-compatible regular expressions (PCRE) is a regular expression engine that is used in most programming language.

It's implemented as a nondeterministic automata (NFA) implementation.

The specification 1) can be found in the Pcre website.

Compatible

PCRE is used and implemented in many languages such as:

2) 3)

1)
http://www.pcre.org/pcre.txt
2)
https://www.pcre.org/original/doc/html/pcrepattern.html
3)
Jeffrey Friedl's “Mastering Regular Expressions”




Discover More
Card Puncher Data Processing
Apache - URL Rewrite (mod_rewrite)

URL rewrite in Apache is done through the rewrite module. The rules are set in the htaccess file This module operates on the full URLs (including the path-info part) both: in per-server context (httpd.conf)...
Java Conceptuel Diagram
Java - Regular Expression

The Regular Expression implementation in Java is based on PCRE. See the comparison to perl section on the java/util/regex/Patternpattern regular expression page Regular expressions are managed within...
Regexp
Multilingual Regular Expression Syntax (Pattern)

Regular expression are Expression that defines a pattern in text. This is therefore a language that permits to define structure of a text. They are a mathematically-defined concept, invented by Stephen...
Nginx - Location block

A location block is a block that is located inside a server block and maps a a resource path to a destination path such as: a local directory or an other service (see ) A server block may have several...
Card Puncher Data Processing
Php - Regular expressions (Perl-compatible)

in Php are an implementation of Perl (PCRE) with the PCRE library (See ). Therefore, the syntax for patterns used in these functions closely resembles to Perl (PCRE) but not totally. See reference.pcre.pattern.differencesPerl...
Regexp
Recursion

? define the group name for the expression enclosed in parenthesis. ie (A \g defines that the expression should be found (defined by the greedy quantifier) A \g defines a pattern that: =====...
Regexp
Regexp - Word Characters

A word can be represented by the shorthand class (\w) and is specified as: any letter (ie the class [A-Za-z]) or any digit (ie the class [0-9]) or the underscore character (ie the [_]) It would...



Share this page:
Follow us:
Task Runner