3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $cool = '[#231234] S1234ubject'; preg_match( '/^\[#(\d+)\]/', $cool, $matches); echo $matches[1]; // 1234 echo $cool;
Output for 4.3.0 - 7.1.0
231234[#231234] S1234ubject