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run code in 200+ php & hhvm versions
Bugs & Features
<?php $action = 'http://MT4ManagerWebService/AuthUser'; echo preg_replace("(\s*)/", 'b', $action);
based on QnV6f
Output for 4.3.11 - 7.2.0
Warning: preg_replace(): Unknown modifier '/' in /in/CPImS on line 4
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '/' in /in/CPImS on line 4