Php Curl Yardım

function curl($url){
    set_time_limit(0);
    $userAgent = 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.2 (KHTML, like Gecko) Chrome/22.0.1216.0 Safari/537.2';
    $proxyList=array(
         '88.248.244.194:9090',
         '212.108.129.22:3128',
         '88.255.148.24:8080'
    );
    $proxyKey=array_rand($proxyList,1);
    $proxy=$proxyList[$proxyKey];
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($curl, CURLOPT_HTTPPROXYTUNNEL, 0);
    curl_setopt($curl, CURLOPT_PROXY, $proxy);
    curl_setopt($curl, CURLOPT_TIMEOUT, 0);
    curl_setopt($curl, CURLOPT_REFERER, 'http://www.google.com');
    curl_setopt($curl, CURLOPT_USERAGENT, $userAgent);
    $data = curl_exec($curl);
    curl_close($curl);
    return $data;
}