- password_hash: documentation ( source)
<?php
$setting = '$2y$04$';
$salt = '1234567890123456789012'; // SAME SALT FOR ALL PASSWORDS, OMG, DON'T
$str = '123456789012345678901234567890123456789012345678901234567890123456789012';
$passwd1 = $str . 'A';
$passwd2 = $str . 'B';
$hash1 = password_hash(passwd1, PASSWORD_BCRYPT);
$hash2 = password_hash(passwd2, PASSWORD_BCRYPT);
echo ($hash1 === $hash2 ? 'same' : 'unique');