$SearchBot_array=array(‘Googlebot’,'Yeti’,'bingbot’,'msnbot’,'Yahoo! Slurp’);
$SearchBotVaild = false;
foreach($SearchBot_array as $SearchBot)
{
$SearchBotVaild = strpos($_SERVER['HTTP_USER_AGENT'], $SearchBot);
if($SearchBotVaild !== false) { break; }
}