PCRE Patterns
Differences From Perl
PCRE Patterns
PHP Manual

# Pattern Syntax

## Table of Contents

- Differences From Perl
- Regular Expression Details

## Description

The PCRE library is a set of functions that implement regular expression pattern matching using the same syntax and semantics as Perl 5, with just a few differences (see below). The current implementation corresponds to Perl 5.005.

PCRE Patterns
Differences From Perl
PCRE Patterns
PHP Manual