<p>
 &nbsp; &nbsp; &nbsp; 宜昌网站建设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。
</p>
<p>
 <br />
</p>
<p>
 自定义的函数如下：
</p>
<br />
$agent = check_wap();<br />
<br />
if( $agent )<br />
<br />
{<br />
<br />
&nbsp; header('Location: http://www.nowamagic.net');<br />
<br />
&nbsp; exit;<br />
<br />
}<br />
<br />
// check if wap<br />
<br />
function check_wap(){<br />
<br />
&nbsp; // 先检查是否为wap代理，准确度高<br />
<br />
&nbsp; if(stristr($_SERVER['HTTP_VIA'],"wap")){<br />
<br />
&nbsp; &nbsp; &nbsp; return true;<br />
<br />
&nbsp; }<br />
<br />
&nbsp; // 检查浏览器是否接受 WML.<br />
<br />
&nbsp; elseif(strpos(strtoupper($_SERVER['HTTP_ACCEPT']),"VND.WAP.WML") &gt; 0){<br />
<br />
&nbsp; &nbsp; &nbsp; return true;<br />
<br />
&nbsp;}<br />
<br />
&nbsp;//检查USER_AGENT<br />
<br />
&nbsp;elseif(preg_match('/(blackberry|configuration\/cldc|hp |hp-|htc |htc_|htc-|iemobile|kindle|midp|mmp|motorola|mobile|nokia|opera mini|opera |Googlebot-Mobile|YahooSeeker\/M1A1-R2D2|android|iphone|ipod|mobi|palm|palmos|pocket|portalmmm|ppc;|smartphone|sonyericsson|sqh|spv|symbian|treo|up.browser|up.link|vodafone|windows ce|xda |xda_)/i', $_SERVER['HTTP_USER_AGENT'])){<br />
<br />
&nbsp; &nbsp; &nbsp; return true; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;<br />
<br />
&nbsp; }<br />
<br />
&nbsp; else{<br />
<br />
&nbsp; &nbsp; &nbsp; return false; &nbsp;<br />
<br />
&nbsp;}<br />
<br />
}<br />