PHP determines whether it is a mobile client, PHP determines whether it is a mobile client_PHP tutorial

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function check_wap(){
    if(stristr($_SERVER['HTTP_VIA'],"wap")){// 先检查是否为wap代理，准确度高
        return true;
    }elseif(strpos(strtoupper($_SERVER['HTTP_ACCEPT']),"VND.WAP.WML") > 0){// 检查浏览器是否接受 WML.
        return true;
   }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'])){//检查USER_AGENT
        return true;             
    }else{
        return false;    
   }
   
}
if(check_wap() && !$_GET['m']){
    Header('Location:http://www.sdceo.com/?m=wap');
}
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<span><</span><span>title</span><span>></span>php判断是否手机客户端<span></</span><span>title</span><span>></span>
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