php 用post请求调用接口api

        $post_data=""; 
        $ch = curl_init();
        $url = '';
        curl_setopt($ch , CURLOPT_URL , $url);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
        curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
        curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, 5);
        curl_setopt($ch, CURLOPT_HEADER, false);
 
        $res = curl_exec($ch);
        curl_close($ch);