$url="http://*";

#下载文件

set_time_limit(0);

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL,$url);

$fp =  fopen('./aa.zip', 'w+');

curl_setopt($ch, CURLOPT_FILE, $fp);

curl_exec ($ch);

curl_close ($ch);

fclose($fp);