php curl怎么删除爬出的服务器信息

Question

function curl_get($url){
    $ch = curl_init();
    curl_setopt($ch,CURLOPT_URL,$url);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);//有返回值
    curl_setopt($ch,CURLOPT_HEADER,1);//取消head头
//    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
//            'Content-Type: application/json; charset=utf-8'
//        )
//    );
    curl_setopt($ch,CURLOPT_USERAGENT,"Mozilla/5.0 (Windows; U; Windows NT 5.2) AppleWebKit/525.13 (KHTML, like Gecko) Chrome/0.2.149.27 Safari/525.13");
    curl_setopt($ch,CURLOPT_TIMEOUT,15);

    curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);//规避https
    curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);

    $output = curl_exec($ch);
    if($output == false){
        curl_close($ch);
        return "error:".curl_error($ch);
    }
    curl_close($ch);
    return $output;
}

爬出数据后var_dump结果是

我只要json那部分数据，其他数据怎么删除

Answer 1

curl_setopt($ch,CURLOPT_HEADER,1); 这个去掉。。。

Answer 2

curl_setopt($ch,CURLOPT_HEADER,0);

Answer 3

curl_setopt($ch,CURLOPT_HEADER,0); 这句将消息头设置为0就不返回响应头了