Как сделать поиск по сайту как на dle-faq ru?

$db->query("SELECT id, short_story, title, date, alt_name, category FROM " . PREFIX . "_post WHERE " . PREFIX . "_post.approve=1".$this_date." AND (short_story LIKE '%{$query}%' OR full_story LIKE '%{$query}%' OR xfields LIKE '%{$query}%' OR title LIKE '%{$query}%') ORDER by date DESC LIMIT 5");

$db->query("SELECT id, short_story, title, date, xfields, alt_name, category FROM " . PREFIX . "_post WHERE " . PREFIX . "_post.approve=1".$this_date." AND (short_story LIKE '%{$query}%' OR full_story LIKE '%{$query}%' OR xfields LIKE '%{$query}%' OR title LIKE '%{$query}%') ORDER by date DESC LIMIT 5");

$description = preg_replace( "'\[attachment=(.*?)\]'si", "", $description );

$xfieldsdata = xfieldsdataload( $row['xfields'] );

$buffer .= "<span>".$description."</span></a>";

$buffer .= "<span><img width=\"50px\" height=\"50px\" src=\"".$xfieldsdata['НАЗВАНИЕ ВАШЕГО ДОПОЛНИТЕЛЬНОГО ПОЛЯ']."\" class=\"poster\" style=\"float:left; margin:5px;\">".$description."</span></a>";