$ch = curl_init($url);//设置需要获取的URL地址，或者$ch=curl_init(); curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_HEADER, 0);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

curl_setopt($ch, CURLOPT_NOSIGNAL, true); //注意，毫秒超时一定要设置这个

curl_setopt($ch, CURLOPT_TIMEOUT_MS, 100); //超时时间100毫秒

curl_exec($ch);

curl_close($ch);