- var_dump: documentation ( source)
- microtime: documentation ( source)
- sort: documentation ( source)
<?php
$arr = [1,2,3,4,2,2,4,2,42,3,25,5,25,5,35,23,5,2,35,5,4,4,54,45,45,4,5,74,3,54,6,3,5,7,8,4,3,6,67,34,67];
$t = microtime();
sort($arr);
var_dump($arr);
echo microtime() -$t;