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。
自定义的函数如下：
代码如下:立即学习“PHP免费学习笔记（深入）
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$agent = check_wap();if( $agent ){header('Location: http://www.nowamagic.net');exit;}// check if wap function check_wap(){// 先检查是否为wap代理，准确度高if(stristr($_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_|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', $_SERVER['HTTP_USER_AGENT'])){return true;}else{return false;}}再来一个从PHP框架剥离的判断是否为手机移动终端的函数：PHP 8.5.5 PHP 8.5.5 是 PHP 8.5 分支的维护更新版本。该版本延续了“小步快跑”的迭代逻辑，通过深度错误修复、底层性能微调以及安全加固，旨在为开发者提供一个更健壮、更高效的运行环境。该版本严格遵守语义化版本规范，不包含破坏性变更。
下载代码如下:立即学习“PHP免费学习笔记（深入）
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function is_mobile_request(){$_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($_SERVER['HTTP_ACCEPT'])) and (strpos(strtolower($_SERVER['HTTP_ACCEPT']),'application/vnd.wap.xhtml+xml') !== false))$mobile_browser++;if(isset($_SERVER['HTTP_X_WAP_PROFILE']))$mobile_browser++;if(isset($_SERVER['HTTP_PROFILE']))$mobile_browser++;$mobile_ua = strtolower(substr($_SERVER['HTTP_USER_AGENT'],0,4));$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=0;// But WP7 is also Windows, with a slightly different characteristic if(strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'windows phone') !== false)$mobile_browser++;if($mobile_browser>0) return true;else return false;}代码很简单，功能很实用，非常适合将其放入项目中，希望小伙伴们能够喜欢。