curl 指定Ip获取远程文件

/**
* 指定ip 获取远程数据
* @ip string ip地址
*/
public function curl_by_host($ip)
{
$httpHeader = array('Host:basic.10jqka.com.cn');
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $ip);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT,2);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_FAILONERROR,1);
curl_setopt($ch, CURLOPT_HTTPHEADER, $httpHeader);
//curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
$file_content = curl_exec($ch);
curl_close($ch);

return $file_content;
}