PHP site to determine whether the user is a mobile phone access method _php instance

With the popularity of mobile devices, the site will also usher in more and more mobile devices access. Used to adapt to the PC page, often unfriendly to mobile phone users, then sometimes, we need to determine whether the user to access the phone, if it is a mobile phone, jump to the designated mobile friendly page. Here is a brief introduction, how to determine whether users use mobile phone access.

The custom functions are as follows:

$agent = Check_wap ();
if ($agent)
{
  header (' location:http://www.jb51.net ');
  Exit;
}
 
Check if WAP 
function Check_wap () {
  ///Checking for WAP proxy first, high accuracy
  if (stristr ($_server[' Http_via '), "WAP") { return
    true;
  }
  Check to see if the browser accepts WML.
  ElseIf (Strpos strtoupper ($_server[' http_accept ')), "VND." Wap. WML ") > 0) {return
    true;
  }
  Check 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;  
  }

A function that is stripped from the PHP frame to determine if it is a mobile terminal: (tested, very comprehensive, recommended for use)

 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)); $mobile = Array (' _agents ', ' acs-', ' Alav ', ' Alca ', ' amoi ', ' Audi ', ' Avan ', ' BenQ ', ' bird ', ' Blac ', ' Blaz ', ' Brew ', ' Cell ', ' cldc ', ' cmd-', ' Dang ', ' doco ', ' Eric ', ' Hipt ', ' Inno ', ' iPAQ ', ' Java ', ' Jigs ', ' kddi ', ' Keji ', ' Leno ', ' lg-c ', ' lg-d ' , ' lg-g ', ' lge-', ' Maui ', ' Maxo ', ' MIDP ', ' mits ', ' mMEF ', ' mobi ', ' mot-', ' moto ', ' mwbp ', ' nec-', ' Newt ', ' Noki ', ' oper ', ' palm ', ' pana ', ' Pant ', ' Phil ', ' play ', ' Port ', ' ProX ', ' Qwap ', ' sage ', ' Sams ', ' Sany ', ' sch-', ' sec-', ' send ', ' Seri ', ' sgh-', ' shar ', ' sie-', ' Siem ', ' smal ', ' Smar ', ' Sony ', ' sph-', ' symb ', ' t-mo ', ' Teli ', ' tim-', ' tosh ', ' tsm-', ' upg1 ', ' upsi ', ' vk-v ', ' Voda ', ' wap-', ' wapa ', ' wapi ', ' Wapp ', ' wap  
 R ', ' Webc ', ' winw ', ' winw ', ' xda ', ' xda-');  
 if (In_array ($mobile _ua, $mobile _agents)) $mobile _browser++;  
 if (Strpos (Strtolower ($_server[' all_http ')), ' Operamini ')!== false) $mobile _browser++; pre-final Check to reset everything if the user was on Windows if (Strpos (Strtolower ($_server[' http_user_agent ')), ' WI  
 Ndows ')!== false) $mobile _browser=0;  But WP7 is also Windows, with a slightly different characteristic if (Strpos (strtolower ' $_server[')),  
 ' Windows Phone ')!== false) $mobile _browser++;  
 if ($mobile _browser>0) return true;  else return false;