php判断来访蜘蛛信息的函数

function get_naps_bot(){
	$useragent=strtolower($_SERVER['HTTP_USER_AGENT']);
	if(strpos($useragent,'googlebot')!==false){
		return 'Googlebot';
	}
	if(strpos($useragent,'msnbot')!==false){
		return 'MSNbot';
	}
	if(strpos($useragent,'slurp')!==false){
		return 'Yahoobot';
	}
	if(strpos($useragent,'baiduspider')!==false){
		return 'Baiduspider';
	}
	if(strpos($useragent,'sohu-search')!==false){
		return 'Sohubot';
	}
	if(strpos($useragent,'lycos')!==false){
		return 'Lycos';
	}
	
	if(strpos($useragent,'robozilla')!==false){
		return 'Robozilla';
	}
	return false;
}