PHP抓取网页的函数

php代码

function curl_file_get_contents($durl){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $durl);
    curl_setopt($ch, CURLOPT_TIMEOUT, 5);
    curl_setopt($ch, CURLOPT_USERAGENT, _USERAGENT_);
    curl_setopt($ch, CURLOPT_REFERER,_REFERER_);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $r = curl_exec($ch);
    curl_close($ch);
    return $r;
}