- var_dump: documentation ( source)
- natsort: documentation ( source)
<?php
$array = array("Fairy Tail - Ending 19v2 [Lenny]", "Fairy Tail - Ending 19v3 [Kagura]", "Fairy Tail - Ending 19v4 [Mio]", "Fairy Tail - Ending 19v1 [Erza]");
natsort($array);
var_dump($array);