Check submitted value matches a hash in Laravel.

validation.php

<?php

// Definition
Validator::extend('hash_matches', function ($attribute, $value, $parameters) {
    return Hash::check($value, $parameters[0]);
});

// Usage
'old_password' => 'required|hash_matches:'.$old_password,

A Laravel validation rule for matching supplied strings against a hash. Useful for change password forms where you require the user to supply their current password before changing.