PHP to determine if it is mobile access

//determine if it is a mobile phonefunctionIs_mobile () {$user _agent=$_server[' Http_user_agent ']; $mobile _agents=Array("240x320", "Acer", "Acoon", "acs-", "Abacho", "Ahong", "Airness", "Alcatel", "Amoi", "Android", "anywhereyougo.com", " applewebkit/525 "," applewebkit/532 "," Asus "," Audio "," Au-mic "," Avantogo "," Becker "," BenQ "," Bilbo "," Bird "," BlackBerry "," blazer "," Bleu "," cdm-"," Compal "," Coolpad "," Danger "," Dbtel "," Dopod "," Elaine "," Eric "," Etouch "," Fly ", "Fly_", "fly-", "Go.web", "goodaccess", "Gradiente", "Grundig", "Haier", "Hedy", "Hitachi", "HTC", "Huawei", "Hutchison", "Inno", "ipad", "iPAQ", "ipod", "Jbrowser", "KDDI", "kgt", "KWC", "Lenovo", "LG", "Lg2", "Lg3", "Lg4", "Lg5", "Lg7", "Lg8", " Lg9 "," lg-"," lge-"," Lge9 "," Longcos "," Maemo "," Mercator "," Meridian "," Micromax "," MIDP "," Mini "," Mitsu "," MMM "," MMP ", "Mobi", "mot-", "Moto", "nec-", "NetFront", "Newgen", "Nexian", "Nf-browser", "Nintendo", "Nitro", "Nokia", "Nook", " Novarra "," Obigo "," Palm "," Panasonic "," Pantech "," Philips "," Phone "," pg-"," PlayStation "," Pocket "," pt-"," qc-"," Qtek "," Rover "," Sagem "," sama "," Samu "," Sanyo "," Samsung "," sch-"," Scooter "," sec-"," Sendo "," sgh-"," Sharp "," Siemens "," Sie-"," SoftBank "," Sony "," sPice "," Sprint "," SPV "," Symbian "," tablet "," Talkabout "," tcl-"," Teleca "," Telit "," Tianyu "," tim-"," Toshiba "," TSM "," Up.browser "," Utec "," Utstar "," Verykool "," Virgin "," vk-"," Voda "," Voxtel "," VX "," WAP "," Wellco "," Wig Browser "," Wii "," Windows CE "," wireless "," XDA "," Xde "," ZTE "); $is _mobile=false; foreach($mobile _agents  as $device) {        if(Stristr($user _agent,$device)) {            $is _mobile=true;  Break; }    }    return $is _mobile;}if(Is_mobile ()) {Your Code}

PHP to determine if it is mobile access