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,p_w_picpath/webp,*