判断用户是否手机访问

随着移动设备的普及，网站也会迎来越来越多 移动设备 的访问。用适应PC的页面，很多时候对手机用户不友好，那么有些时候，我们需要判断用户是否用手机访问，如果是手机的话，就跳转到指定的手机友好页面。这里就介绍一下，如何判断用户是否用手机访问。

<?php
	/*
	*@Descrition:判断用户是否手机访问
	*
	*
	*/
	$agent = check_wap();
	if($agent){
		header('Location:http://www.goole.com');//重定向
		exit;
	}

	//check if wap
	function check_wap(){
		//先检查是否为wap代理，准确度高
		if(stristr($_SERVER['HTTP_VIA'], 'wap')){
			return true;
		}
		//检查浏览器是否接受WML
		elseif(strpos(strtoupper($_SERVER['HTTP_ACCEPT']), 'VND.WAP.WML') > 0){
			return true;
		}
		//检查USER_AGENT
		elseif(preg_match('/(blackberry|configuration\/cldc|hp| hp-|htc_|htc-|googlebot-Mobile|YahooSeeker\/M1A1-R2D2|android|iphone|ipad|mobi|palm|palmos|pocket|portalmmm|ppc;|smartphone|sorce|xda |xda_)/i', $_SERVER['HTTP_USER_AGENT'])){
			return true;
		}else{
			return false;
		}
	}

	//这个函数是从php框架剥离的判断是否为手机移动终端的函数
	function is_mobile_request(){
		$_SERVER['ALL_HTTP'] = isset($_SERVER['ALL_HTTP']) ? $_SERVER['ALL_HTTP'] : '';
		$mobile_browser = '0';
		if(preg_match('/(up.browser|up.link|mmp|symbian|smartphone|midp|wap|phone|iphone|ipad|ipod|android|xoom)/i', strtolower($_SERVER['HTTP_USER_AGENT']))){
			$mobile_browser++;
		}
		if(isset($_SERVER['HTTP_X_WAP_FROFILE'])){
			$mobile_browser++;
		}
		if(isset($_SERVER['HTTP_PROFILE'])){
			$mobile_browser++;
		}
		$mobile_ua = strtolower(substr($_SERVER['HTTP_USER_AGENT'], 0, 4));
		$mobile_agents = $mobile_agents = array(  
			'w3c ','acs-','alav','alca','amoi','audi','avan','benq','bird','blac',  
			'blaz','brew','cell','cldc','cmd-','dang','doco','eric','hipt','inno',  
			'ipaq','java','jigs','kddi','keji','leno','lg-c','lg-d','lg-g','lge-',  
			'maui','maxo','midp','mits','mmef','mobi','mot-','moto','mwbp','nec-',  
			'newt','noki','oper','palm','pana','pant','phil','play','port','prox',  
			'qwap','sage','sams','sany','sch-','sec-','send','seri','sgh-','shar',  
			'sie-','siem','smal','smar','sony','sph-','symb','t-mo','teli','tim-',  
			'tosh','tsm-','upg1','upsi','vk-v','voda','wap-','wapa','wapi','wapp',  
			'wapr','webc','winw','winw','xda','xda-' 
		);
		if(in_array($mobile_ua, $mobile_agents)){
			$mobile_browser++;
		}
		if(strpos(strtolower($_SERVER['ALL_HTTP']), 'operamini') !== false){
			$mobile_browser++;
		}
		//Pre-final check to reset everything if the user is on windows
		if(strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'windows') !== false){
			$mobile_browser++;
		}
		if($mobile_browser > 0){
			return true;
		}else{
			return false;
		}
	}
?>

代码没有经过自己的测试。如果有错误，请指出！！！

代码来源地址：http://www.nowamagic.net/librarys/veda/detail/2499