function getRandomUserAgent() {
$userAgents=array(
"Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6",
"Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)",
"Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30)",
"Opera/9.20 (Windows NT 6.0; U; en)", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; en) Opera 8.50",
"Mozilla/4.0 (compatible; MSIE 6.0; MSIE 5.5; Windows NT 5.1) Opera 7.02 [en]",
"Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; fr; rv:1.7) Gecko/20040624 Firefox/0.9",
"Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/48 (like Gecko) Safari/48"
);

$rastgele = rand(0,count($userAgents)-1);
return $userAgents[$rastgele];
}
curl_setopt($ch,CURLOPT_USERAGENT,getRandomUserAgent());