function get_content($url){
 $ch = curl_init();
 curl_setopt($ch, CURLOPT_URL, $url);
 $header = array();
 $header[] = 'Host: t.xx.com';
 $header[] = 'Accept-Encoding: gzip, deflate, sdch';
 $header[] = 'Accept-Language: zh-CN,zh;q=0.8';
 $header[] = 'Cookie: _hc.v=d846d370-b934-97da-2584-df1d51be8040.1476003831; aburl=1; cy=2; cye=beijing; _tr.u=rw0PincYp5DQrbEl; t_rct=20921750; PHOENIX_ID=0a010818-158198588e7-de0339';
 $header[] = 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8';
 $header[] = 'Connection: keep-alive';
 // $header[] = 'X-UCBrowser-UA: dv(HUAWEI G610-T00);pr(UCBrowser/10.4.0.558);ov(Android 4.2.1);ss(360*640);pi(540*960);bt(UC);pm(1);bv(1);nm(0);im(0);sr(0);nt(2);';
 curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
 curl_setopt($ch, CURLOPT_HEADER, 0);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 //若给定url自动跳转到新的url,有了下面参数可自动获取新url内容：302跳转
 curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
 //设置cURL允许执行的最长秒数。
 curl_setopt($ch, CURLOPT_TIMEOUT, 10);
 curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36');
 curl_setopt($ch, CURLOPT_REFERER, $url);
 curl_setopt($ch, CURLOPT_ENCODING, 'gzip, deflate');
 $content = curl_exec($ch);
 //获取请求返回码，请求成功返回200
 $code = curl_getinfo($ch,CURLINFO_HTTP_CODE);
 //获取一个cURL连接资源句柄的信息。
 //$headers 中包含跳转的url路径
 // $headers = curl_getinfo($ch);
 return $content;
 }

//查看元素,模拟Request Headers 内容,再请求