- substr: documentation ( source)
- var_dump: documentation ( source)
- hash: documentation ( source)
- hexdec: documentation ( source)
<?php $i = 0; for ($number0 = 0; $number0 < 1000000; $number0++) if (5 === hexdec(substr(hash("sha256",$number0."-0405233536-371638"),0,8)) % 15) $i++; var_dump($i);;