Código PHP:
<?php
$fp = fopen("somefile.html", "w");
$ch = curl_init("url");
$cok = 'cockie';
curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
curl_setopt($ch, CURLOPT_COOKIE, $cok);
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_exec($ch);
curl_close ($ch);
?>