PHP function to determine whether the computer-side browser access Access or mobile browser access

Forget where to get the function, just can't find in a bag, temporarily saved up

/** *  whether mobile Access  * *  @return  bool */function ismobile () {      //  If Http_x_wap_profile is a mobile device     if  (isset  ($_server[' Http_x_wap_profile ']))     {        return  true;    }     //  If via information contains WAP, it must be a mobile device, some service associations block this information      if  (isset  ($_server[' Http_via '))     {          //  not found for flase, otherwise True        return  stristr ($_server[' Http_via '],  "WAP")  ? true : false;    }      //  brain Residue method, determine the mobile phone to send the client logo, compatibility needs to be improved     if  (isset  ($_ server[' Http_user_agent '))     {        $ clientkeywords = array&nbsp (' Nokia ',             ' Sony ',              ' Ericsson ',              ' mot ',              ' Samsung ',             ' HTC ',              ' SGH ',              ' LG ',             ' Sharp ',             ' sie-',              ' Philips ',              ' Panasonic ',             ' Alcatel ',             ' Lenovo ',              ' iphone ',             ' ipod ',             ' BlackBerry ',              ' Meizu ',              ' Android ',             ' NetFront ',             ' Symbian ',              ' UCWeb ',              ' WindowsCE ',             ' Palm ',             ' Operamini ',              ' Operamobi ',              ' Openwave ',             ' Nexusone ',              ' CLDC ',              ' MIDP ',              ' WAP ',             ' mobile '              );            Find the keyword         if  (Preg_match ("/(") for your phone's browser from Http_user_agent  . implode (' | ',  $clientkeywords)  .  ")/I",  strtolower ($_server[' http_user_agent ') )))         {             return true;        }     }      //  protocol law, because there may be inaccuracies, put to Final Judgment     if  (isset  ($_server[' http_accept ')))     {         //  If only WML is supported and HTML is not supported it must be a mobile device         //  If WML and HTML are supported but WML before HTML is mobile device         if  ((Strpos ($_server[' http_ ACCEPT '],  ' vnd.wap.wml ')  !== false)  &&  (Strpos ($_server[' http_accept '],  ' text/html ')  === false | |   (Strpos ($_server[' http_accept '],  ' vnd.wap.wml ')  < strpos ($_server[' http_accept '),   ' text/html '))         {             return true;        }      }     return false;} 

PHP function to determine whether the computer-side browser access Access or mobile browser access