<?php $message = 'Message'; $secret = 'secret'; $hash1 = hash_hmac('sha256', $message, $secret, true); $encoded1 = base64_encode($hash1); $hash2 = hash_hmac('sha256', $message, $secret, true); $encoded2 = base64_encode($hash2); var_dump(hash_equals($hash1, $hash2));
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