Looking for webscraping resources....

http://phantomjs.org/

http://casperjs.org/

function curly($url) {
    $proxy_list = get_option('proxy_list');
    $proxies = @explode("\n", $proxy_list);
    $proxy_support = false;
    if (!empty($proxies)) {
        $random_proxy = $proxies[rand(0, (count($proxies) - 1))];
        if (!empty($random_proxy)) {
            $proxy_support = true;
        }
    }
    $agent = 'Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.3) Gecko/20090910 Ubuntu/9.04 (jaunty) Shiretoko/3.5.3';

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_VERBOSE, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); // for redirects
    curl_setopt($ch, CURLOPT_USERAGENT, $agent);
    curl_setopt($ch, CURLOPT_REFERER, "http://tech5.net");
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 0);
    curl_setopt($ch, CURLOPT_TIMEOUT, 400);
    curl_setopt($ch, CURLOPT_POST, false);
    if ($proxy_support)
        curl_setopt($ch, CURLOPT_PROXY, $random_proxy);
    curl_setopt($ch, CURLOPT_URL, $url);
    return curl_exec($ch);
}

$url = 'https://www.google.co.in/search?num=50&safe=off&client=firefox-a&hs=Mn8&rls=org.mozilla:en-US:official&channel=rcs&q=bottlenecks&spell=1&sa=X&ei=q_erU6aTKo-9uAT074GgDQ&ved=0CBoQvwUoAA&biw=1366&bih=587';

$html = curly($url);//this function is defined in the last example. Include this function in your script
$dom = new DOMDocument();

$dom->loadHTML($html);
$xpath = new DOMXPath($dom); 
/* Google shows the links for a search result in a tag inside h3 tags having class "r". So we are doing //h3[@class="r"]//a*/
$links = $xpath->query('//h3[@class="r"]//a');
$length = $links->length; // total number of links fetched
$all_links = array(); // this will store your links

for ($i = 0; $i < $length; $i++) {
  $element = $links->item($i);
  /* find the  href attribute of every element and put the first value in $all_links */
  $all_links[] = $xpath->evaluate('@href', $element)->item(0)->value;
}

/* now your variable $all_links has all the links. do something with it*/