判断是否是手机等移动端访问

CI控制判断判断，并存入session，为以后其它访问页面，判断session值是否为"yes" 继续，显示移动端样式页面或电脑端样式页面

public function index()
	{
		
		// '手机访问';
		 if(stripos($_SERVER['HTTP_USER_AGENT'],"android")!=false||stripos($_SERVER['HTTP_USER_AGENT'],"ios")!=false||stripos($_SERVER['HTTP_USER_AGENT'],"wp")!=false){
		 	
		 	//echo '手机访问';		
		 	//echo '';  	
		 	
		 	
		 	$_SESSION["ismobile"]="yes";
		 	//echo $_SESSION['ismobile'];

		 	$className = new Clubfront2();
			$className->index();

		 }else //电脑访问
		 {
			$className = new Clubfront2();
			$className->index();

		 }



		
	}
}

另一种写法

0?$matches[0]:'';  	  
	function CheckSubstrs($substrs,$text){  
		foreach($substrs as $substr)  
			if(false!==strpos($text,$substr)){  
				return true;  
			}  
			return false;  
	}
	$mobile_os_list=array('Google Wireless Transcoder','Windows CE','WindowsCE','Symbian','Android','armv6l','armv5','Mobile','CentOS','mowser','AvantGo','Opera Mobi','J2ME/MIDP','Smartphone','Go.Web','Palm','iPAQ');
	$mobile_token_list=array('Profile/MIDP','Configuration/CLDC-','160×160','176×220','240×240','240×320','320×240','UP.Browser','UP.Link','SymbianOS','PalmOS','PocketPC','SonyEricsson','Nokia','BlackBerry','Vodafone','BenQ','Novarra-Vision','Iris','NetFront','HTC_','Xda_','SAMSUNG-SGH','Wapaka','DoCoMo','iPhone','iPod');  
		  
	$found_mobile=CheckSubstrs($mobile_os_list,$useragent_commentsblock) ||  
			  CheckSubstrs($mobile_token_list,$useragent);  
		  
	if ($found_mobile){  
		return true;  
	}else{  
		return false;  
	}  
}
if (isMobile())
	echo '手机登录m.php100.com';
else
	echo '电脑登录www.php100.com';
?>