3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $date="2012-09-12"; if (preg_match("/^[0-9]{4}-[0-1][0-9]-[0-3][0-9]$/",$date)) { return true; }else{ return false; }
Output for 4.3.0 - 7.1.0