W-Shadow.com

function googleImageResults($query, $page=1, $safe='off', $dc="images.google.com"){
    $page--;
    $perpage = 21;
    $url=sprintf("http://%s/images?q=%s&gbv=2&start=%d&hl=en&ie=UTF-8&safe=%s&sa=N",
        $dc,urlencode($query),$page*$perpage,$safe);
 
    $hc=new eHttpClient();
    $hc->setReferer("http://".$dc."/");
    $html=$hc->get($url);
    $code = $hc->getInfo(CURLINFO_HTTP_CODE);
    if ($code != '200') return false;
 
    if(!preg_match_all('/dyn.Img\((.+)\);/Uis', $html, $matches, PREG_SET_ORDER))
        return array();
    $results=array();
    foreach($matches as $match){
        if(!preg_match_all( '/"([^"]*)",/i', $match[1], $parts)) continue;
 
        if(!preg_match('/(.+?)&h=(\d+)&w=(\d+)&sz=(\d+)&hl=[^&]*&start=(\d+)(?:.*)/', 
		$parts[1][0], $url_parts)
	) continue;
        $refUrl = urldecode($url_parts[1]);
        $height = intval($url_parts[2]);
        $width = intval($url_parts[3]);
        $rank = intval($url_parts[5]);
        //check if we've already passed the last page of results 
        if($rank < ($page * $perpage + 1)) break;
        $imgUrl = urldecode($parts[1][3]);
        $refDomain = $parts[1][11];
        $imgText = $parts[1][6];
        $imgText = preg_replace('/\\\x(\w\w)/', '&#x\1;', $imgText);
        $imgText = strip_tags(html_entity_decode($imgText));
        $thumbUrl = $parts[1][14].'?q=tbn:'.$parts[1][2].$imgUrl;
 
        $one_result=array(
            'Rank' => $rank,
            'RefUrl' => $refUrl,
            'ImgText' => $imgText,
            'ImgUrl' => $imgUrl,
            'Height' => $height,
            'Width' => $width,
            'Host' => $refDomain,
            'ThumbUrl' => $thumbUrl,
        );
        array_push($results,$one_result);
    }
    return $results;
}

$results = googleImageResults('headcrab', 1);
print_r($results);

Array
(
    [0] => Array
        (
            [Rank] => 1
            [RefUrl]=>http://bjoern.amherd.net/2006/12/15/headcrab-chappe/
            [ImgText] => Headcrab-Chappe
            [ImgUrl]=>http://bjoern.amherd.net/wp-content/uploads/2006/12/headcrab.jpg
            [Height] => 297
            [Width] => 450
            [Host] => bjoern.amherd.net
            [ThumbUrl]=>http://tbn0.google.com/images?q=tbn:2drTKLkzK4KZQM:http://bjoern.amherd.net/wp-content/uploads/2006/12/headcrab.jpg
        )
 
    [1] => Array
        (
            [Rank] => 2
            [RefUrl]=>http://www.penny-arcade.com/comic/2004/11/15
            [ImgText] => The Common Headcrab
            [ImgUrl]=>http://www.penny-arcade.com/images/2004/20041115h.jpg
            [Height] => 423
            [Width] => 750
            [Host]=>www.penny-arcade.com
            [ThumbUrl]=>http://tbn0.google.com/images?q=tbn:A2d3zKEpYJe0FM:http://www.penny-arcade.com/images/2004/20041115h.jpg
        )
   ......