- var_dump: documentation ( source)
- password_needs_rehash: documentation ( source)
<?php
var_dump(password_needs_rehash(null, PASSWORD_BCRYPT));
echo "\n";
var_dump(password_needs_rehash('$2y$10$S2j/mLdZIAK/MONvQU57zemRuFR53qW91EBX03nCfNcndAdfOfSnS', PASSWORD_BCRYPT));
echo "\n";
var_dump(password_needs_rehash("holladrio", PASSWORD_BCRYPT));