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<?php function aesEncrypt($str, $key) { return mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, aesEncryptPad($str), MCRYPT_MODE_ECB); } function aesEncryptPad($str, $blockSize = 16) { $len = $blockSize - (strlen($str) % $blockSize); $padding = str_repeat(chr($len), $len); return $str . $padding; } var_dump(aesEncrypt('ROLL TIDE', 'pass'));

preferences:
39.91 ms | 402 KiB | 5 Q