- var_dump: documentation ( source)
- password_hash: documentation ( source)
- password_needs_rehash: documentation ( source)
- password_get_info: documentation ( source)
<?php
$password = 'mypassword';
$hash = password_hash($password, PASSWORD_DEFAULT);
var_dump(password_get_info($hash));
echo "Password needs rehash? => ";
echo (password_needs_rehash($hash, PASSWORD_DEFAULT)) ? 'yes':'no';