What is PHP Regex Tester?
PHP Regex Tester — A PHP regex tester lets you prototype patterns for PHP's preg_* functions (the PCRE2 engine) — preg_match, preg_match_all, preg_replace — with instant match highlighting and copyable PHP code with the delimiters already in place.
This PHP regex tester covers the everyday preg workflow: build the pattern against sample text, inspect capture groups, then copy a runnable snippet with the part people most often get wrong — the delimiters — already handled (PHP patterns are strings like '/pattern/i', and forgetting the delimiters is the #1 preg_match error). Matching here runs on JavaScript's engine; PCRE2 is a superset for practical purposes, so patterns that work here work in PHP, and PHP adds power features on top — possessive quantifiers, atomic groups, \K, recursion — listed in the table below.