取代file_get_contents 的一个采集函数

 function url_get_content($url=''){
 $ch = curl_init();
 $timeout = 100;
 $browser = 'Mozilla/5.0 (Windows NT 5.1; rv:20.0) Gecko/20100101 Firefox/20.0';
 curl_setopt($ch, CURLOPT_USERAGENT, $browser);
 curl_setopt($ch, CURLOPT_URL, $url);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
 curl_setopt($ch, CURLOPT_ENCODING, "");
 $contents = curl_exec($ch);
 //    var_dump($contents);
 curl_close($ch);
 return $contents;
 }