3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $regex = '/#([a-zA-z0-9_]+)(:[a-zA-Z]+)/'; $pattern = '#nombre:tipo'; echo preg_replace($regex, "(?<$1>$2)", $pattern);
Output for 4.3.0 - 7.2.0
(?<nombre>:tipo)