3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo strtolower(preg_replace('/WHERE\s* ([a-zA-Z])\s*=\s*([a-zA-Z])/i', '$1_$2', 'WHERE algo = algo'));
Output for 4.3.0 - 7.1.0
where algo = algo