- substr: documentation ( source)
- password_hash: documentation ( source)
- password_verify: documentation ( source)
- md5: documentation ( source)
<?php
echo $a = md5('4c6e15');
echo "\n";
echo $b = '$md5' . password_hash($a, PASSWORD_DEFAULT);
echo "\n";
echo substr($b, 0, 4);
echo "\n";
echo password_verify($a, substr($b, 4));