public static function detectSearchEngine($referrerURL){

        $search_engines = Array (
            Array("name"=>"Mail", "pattern"=>"go.mail.ru/search_images", "param"=>"q="),
            Array("name"=>"Mail", "pattern"=>"go.mail.ru", "param"=>"q="),
            Array("name"=>"Google", "pattern"=>"images.google.", "param"=>"q="),
            Array("name"=>"Google", "pattern"=>"google.", "param"=>"q="),
            Array("name"=>"Google", "pattern"=>"google.", "param"=>"as_q="),
            Array("name"=>"Yahoo", "pattern"=>"search.yahoo.com", "param"=>"p="),
            Array("name"=>"Yandex", "pattern"=>"images.yandex.ru/", "param"=>"text="),
            Array("name"=>"Yandex", "pattern"=>"m.yandex.ru/search", "param"=>"query="),
            Array("name"=>"Yandex", "pattern"=>"yandex.ru/msearch", "param"=>"text="),
            Array("name"=>"Yandex", "pattern"=>"hghltd.yandex.net", "param"=>"text="),
            Array("name"=>"Yandex", "pattern"=>"yandex.ru", "param"=>"text="),
            Array("name"=>"Yandex", "pattern"=>"ya.ru", "param"=>"key="),
            Array("name"=>"Bing", "pattern"=>"bing.com", "param"=>"q="),
        );

        if ( isset ( $referrerURL ) && strlen ( $referrerURL ) > 3 ){
            $tmp = parse_url ( urldecode ( trim ( $referrerURL ) ) );
            if ( is_array ( $tmp ) && isset ( $tmp["host"] ) ) {
                if (!isset ($tmp["path"])) {
                    $tmp["path"] = "";
                }
                $reff = str_replace("www.", "", $tmp["host"]) . $tmp["path"];

                if ( isset ( $tmp["query"] ) && strlen ( $tmp["query"] ) > 2 ){
                    $params = explode ( "&", $tmp["query"] );
                    foreach ( $search_engines as $engine ) {   // Поиск по всем сигнатурам
                        if (strpos($reff, $engine['pattern']) !== FALSE) {
                            $i = strlen ( $engine['param'] );
                            foreach ( $params as $param )
                            {
                                if ( !$param ){
                                    continue;
                                }
                                if ( substr ( $param, 0, $i ) == $engine['param'] ){
                                    return $engine['name'];
                                }
                            }
                        }
                    }
                }

            }
        }else{
            return false;
        }

        return false;
    }