YII php模拟post传输multipart/form-data带多维数组数据

方法一：
post发送：
function curl_post($url, $post_data)
{
error_reporting(E_WARNING);
$delimiter = uniqid();
$ch=cur{l}_{i}nit();cur{l}_{s}etopt($ch, CURLOPT_POST, true);

    curl_setopt($ch, CURLOPT_POSTFIELDS,$post_data );
    curl_setopt($ch, CURLOPT_URL, $url);
    $header = array("Content-Type:multipart/form-data;charset=utf-8", 'Content-Length: ' . strlen($post_data));
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header); //设置HTTP头
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //设置是否返回信息
    $info = curl_exec($ch); //接收返回信息
    if (curl_errno($ch)) {
        print curl_error($ch);
    }
    curl_close($ch); //关闭curl链接

    $result = json_decode($info, true);
    return $result;
}

数据组合：
public function actionImA(){
var_dump(${}_{P}OST);va{r}_{d}u$