php curl 下载文件

function curl_download($remote, $local) {
     $cp = curl_init($remote);
     $fp = fopen($local, "w");
    
    curl_setopt($cp, CURLOPT_FILE, $fp);
    curl_setopt($cp, CURLOPT_HEADER, 0);
    
     curl_exec($cp);
     curl_close($cp);
     fclose($fp);    
}