有些接口用CURL调用的时候，要发送header头信息

如百度的查询快递的接口

PHP代码如下:

$url = "https://sp0.baidu.com/9_Q4sjW91Qh3otqbppnN2DJv/pae/channel/data/asyncqury?appid=4001&com={$type}&nu={$deliveryBn}";
        $headers = array(
        "Host: sp0.baidu.com",
        "Connection: keep-alive",
        "Cache-Control: max-age=0",
        "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
        "User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.124 Safari/537.36",
        "Accept-Encoding: gzip, deflate, sdch",
        "Accept-Language: zh-CN,zh;q=0.8",
        "Cookie: BAIDUID=FAFE6A61C5C95A71A482ABC3315F9228:FG=1; BIDUPSID=FAFE6A61C5C95A71A482ABC3315F9228; PSTM=1435563408; BD_UPN=12314653
        ");
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

        $output = curl_exec($ch);
        curl_close($ch);
        $arr = json_decode($output, true)
/**
    $type是快递公司的代码简称，如:yuantong，shentong，ems,shunfeng,yunda,zhongtong,tiantian,debang,zhaijisong等
    $deliveryBn则是运单号
    
**/

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Curl发送header头信息