class Aes {/*** 加密* @param $plain* @param $key* @return false|string*/public static function encrypt($plain, $key){if (trim($key) == '') {return false;}$key = self::_sha1prng($key);if(version_compare(PHP_VERSION,'7.1','>=')){$iv = '';$encrypted = openssl_encrypt($plain, 'AES-128-ECB', $key, OPENSSL_RAW_DATA, $iv);}else{$plain       = strval($plain);$block_size  = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);$padded_data = self::_pkcs5_pad($plain, $block_size);$iv_size     = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);$iv          = mcrypt_create_iv($iv_size, MCRYPT_RAND);$encrypted   = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $padded_data, MCRYPT_MODE_ECB, $iv);}return base64_encode($encrypted);}/*** aes解密* @param $cipher   密文* @param $key* @return false|string*/public static function decrypt($cipher, $key){if ( ! is_string($cipher) || trim($key) == '') {return false;}$key = self::_sha1prng($key);$decoded = base64_decode($cipher);if ($decoded){if(version_compare(PHP_VERSION,'7.1','>=')){$iv = '';return  openssl_decrypt($decoded, 'AES-128-ECB', $key, OPENSSL_RAW_DATA, $iv);}else{$block_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);$iv         = mcrypt_create_iv($block_size, MCRYPT_RAND);$decrypted  = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $decoded, MCRYPT_MODE_ECB, $iv);return self::_pkcs5_unpad($decrypted);}}return false;}/*** SHA1PRNG算法* @param $key* @return string*/private static function _sha1prng($key){return substr(openssl_digest(openssl_digest($key, 'sha1', true), 'sha1', true), 0, 16);}private static function _pkcs5_pad($text, $block_size){$pad = $block_size - (strlen($text) % $block_size);return $text . str_repeat(chr($pad), $pad);}private static function _pkcs5_unpad($text){$end  = substr($text, -1);$last = ord($end);$len  = strlen($text) - $last;if (substr($text, $len) == str_repeat($end, $last)) {return substr($text, 0, $len);}return false;}
}//使用方法：
$keyStr = 'sdez';
$aes = new Aes();
$str = '{"openCode":"a9ae-8394-49bb","phone":"9988","name":"test","type":"2"}';
$chgstr = $aes->encrypt($str,$keyStr);
echo $chgstr;
echo PHP_EOL;
$rstr = $aes->decrypt($chgstr,$keyStr);
echo $rstr;