PHP解密小程序加密数据

<?php

$encryptData = input('encryptedData','','trim'); //小程序加密数据
$iv = input('iv','','trim'); //小程序加密方法
$sessionKey = $_SESSION['session_key']; //小程序登录session_key

if (empty($_SESSION['session_key']) || empty($encrypt_data) || empty($iv)) { 
　　$this->error('请先登录', [], 500); 
} 

$aesKey = base64_decode($sessionKey); 
$aesIV = base64_decode($iv); 
$aesCipher = base64_decode($encryptData); 
$result = openssl_decrypt($aesCipher, "AES-128-CBC", $aesKey, 1, $aesIV); 
$data = json_decode($result, true); 
//var_dump(data);