Retrieve Search result from google

SearchResult.php

function getSearchResult($keyword){

    $subject = file_get_contents("http://www.google.com/search?q=".urlencode($keyword));

    $href_pattern = '/<h3 class="r">(.*?)<\/h3>/s';
    preg_match_all($href_pattern, $subject, $matches);

    foreach ($matches[0] as $key => $match) {

        $replacment_pattern = '/href="([^"]+)"/';
        preg_match($replacment_pattern, $match, $found);
        $found = explode("&", $found[1]);
        $found[0] = str_replace("/url?q=", "", $found[0]);

        $found[0] = urldecode($found[0]);
        $replace_url = preg_replace($replacment_pattern, "href='".$found[0]."'", $match);
        settype($replace_url, "string");

        if( gettype($replace_url) != "boolean" )
            $matches[0][$key] = $replace_url;
        else
            unset($matches[0][$key]);

        if( json_encode($matches[0][$key]) == false )
            unset($matches[0][$key]);
    }

    return $matches[0];
}