Regular Expressions (Perl-Compatible)
- Introduction
 - Installing/Configuring
 - Predefined Constants
 - Examples
 - PCRE Patterns
- Possible modifiers in regex patterns — Pattern Modifiers
 - Differences From Perl — Perl Differences
 - Differences from POSIX regex
 - PCRE regex syntax — Pattern Syntax
 
 - PCRE Functions
- preg_filter — Perform a regular expression search and replace
 - preg_grep — Return array entries that match the pattern
 - preg_last_error — Returns the error code of the last PCRE regex execution
 - preg_match_all — Perform a global regular expression match
 - preg_match — Perform a regular expression match
 - preg_quote — Quote regular expression characters
 - preg_replace_callback — Perform a regular expression search and replace using a callback
 - preg_replace — Perform a regular expression search and replace
 - preg_split — Split string by a regular expression