<?php $encrypt_result = mcrypt_encrypt_(MCRYPT_RIJNDAEL_256, "bite", "data", MCRYPT_MODE_ECB); var_dump($encrypt_result); $user_id = 4; $result = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, "bite", base64_decode($user_id), MCRYPT_MODE_ECB), "\0"); var_dump($result);
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