my.getPhoneNumber({
 success: (res) => {
 let encryptedData = res.response;
 my.httpRequest({
  url: '你的后端服务端',
  data: encryptedData,
 });
 },
 fail: (res) => {
 console.log(res);
 console.log('getPhoneNumber_fail');
 },
});

public static function decryptData($encryptedData, $key = '开发设置-接口内容加密方式-查看-字符串')
 {
 $encrys = json_decode($encryptedData, true);
 $encryptedData = $encrys['response'];
 $str = base64_decode($encryptedData);
 $screct_key = base64_decode($key);

 //设置全0的IV
 $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
 $iv = str_repeat("\0", $iv_size);

 $decrypt_str = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $screct_key, $str, MCRYPT_MODE_CBC, $iv);
 $decrypt_str = self::stripPKSC7Padding($decrypt_str);
 return $decrypt_str;
 }

 public static function stripPKSC7Padding($source)
 {
 $char = substr($source, -1);
 $num = ord($char);
 if ($num == 62) return $source;
 $source = substr($source, 0, -$num);
 return $source;
 }

{"code":"10000","msg":"Success","mobile":"185xxxxx111"}

{
 "response": "EaieI1W9gPK0zClNbA7P0T6svaSYq/1xejihTXNVSH0WyCjBIcP2xOwaAevaYgb4aeQ5NNRQaqbZgVvfJKfaLQ==",
 "sign": "iSHQH/r3rZiBx7N49SwQNHx2Y0B6OP2ePvhS+T2XKw9+dzt3T1W9T0cHSldFlkczcdPQ05Pi/bEygsZxip6StCNEqse7ou/nXx9QOAVNoBgZfb4bmFJxOl8DYeuF8VKQy+NdxuvRGJFpmVynZtSNy31BfD4663IowMj80/pfnmLJCEKqoS2oHWtGRRM7oIFEdCH5IJKCsq79qxFEPwmQVid2uN0XuL/Rg+lKN9eAbTGcBttVZGaI11vGDEBUq9sNksVJXWUHofszCeD9jGz8pGoNvApRt8Swe2RnVtWcnQ+Zh+G105fPpp3RYNZBSBV9EJJ5la5IEv8KfAwjW7jGFg=="
}

/**
 * 解密
 *
 * return mix
 */
function decryptData(string $encrypted_data)
{
 $key = env('EAS');
 $aesKey=base64_decode($key);
 $iv = 0;
 $aesIV=base64_decode($iv);
 $aesCipher=base64_decode($encrypted_data);
 $result=openssl_decrypt( $aesCipher, "AES-128-CBC", $aesKey, 1, $aesIV);
 return $result;
}

echo decryptData('EaieI1W9gPK0zClNbA7P0T6svaSYq/1xejihTXNVSH0WyCjBIcP2xOwaAevaYgb4aeQ5NNRQaqbZgVvfJKfaLQ==');

// {"code":"10000","msg":"Success","mobile":"1342XXXXXXX"}