3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo strtolower(preg_replace('/([a-zA-Z])\s*=\s*([a-zA-Z])\s*(AND|OR)/i', '$1_$2', 'algo = asslgo and'));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
algo = asslgo and