Haberleri Rss den çekmeni tavsiye ederim ama php curl login kodu aşağıdaki gibidir..

function curl($url, $post=false)
{
$user_agent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; tr; rv:1.9.0.6) Gecko/2009011913 Firefox/3.0.6';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, $post ? true : false);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post ? $post : false);
curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
$icerik = curl_exec($ch);
curl_close($ch);
return $icerik;
}
echo curl("http://www.siteadı.com/login.php", "user_login=kullanici&user_pass=sifre");

şeklinde giriş yapabilirsin ?