Regular Expression (POSIX Extended)

Introduction
Installing/Configuring
Predefined Constants
Examples
POSIX Regex Functions
- ereg_replace — Replace regular expression
- ereg — Regular expression match
- eregi_replace — Replace regular expression case insensitive
- eregi — Case insensitive regular expression match
- split — Split string into array by regular expression
- spliti — Split string into array by regular expression case insensitive
- sql_regcase — Make regular expression for case insensitive match

User Contributed Notes

4 years ago


The POSIX functions are deprecated.  Instead of the "ereg" collection you want to use something from the PCRE world.
http://www.php.net/manual/en/book.pcre.php

Daniel Klein

4 years ago


PCRE has very good utf-8 support. Simply add the /u modifier to your pattern.

preg_match('/non-utf-8 matching pattern/', $string);
preg_match('/utf-8 matching pattern/u', $string);