- print_r: documentation ( source)
- sort: documentation ( source)
- array_diff: documentation ( source)
<?php
$var1 = sort(array(213, 247, 221, 247, 220, 214, 203, 233, 330, 212, 238, 214, 213, 247, 221, 247, 220, 214, 203, 233));
$var2 = sort(array(307, 357, 319, 357, 317, 308, 293, 336, 476, 306, 343, 308, 307, 357, 319, 357, 317, 308, 293, 336));
print_r(array_diff($var1, $var2));