How PHP identifies a computer-or mobile-phone access site

Now through the mobile phone access to the site more and more popular, if we want to count the website through the PC, mobile phone mobile side of the situation, or need to do some special processing mobile phone, then we need to visit the site of the user's client to do the identification, The following example is a way to identify whether a user is a computer or a mobile phone through PHP.

  
function IsMobile () {
$useragent =isset ($_server[' http_user_agent ')? $_server[' http_user_agent ': ';
$useragent _commentsblock=preg_match (' |\ (. *?\) | ', $useragent, $matches) >0? $matches [0]: ';
$mobile _os_list=array (' Google Wireless transcoder ', ' Windows CE ', ' windowsce ', ' Symbian ', ' Android ', ' armv6l ', ' armv5 ', ' Mobile ', ' CentOS ', ' mowser ', ' AvantGo ', ' Opera Mobi ', ' J2ME/MIDP ', ' Smartphone ', ' go.web ', ' Palm ', ' IPAQ ');
$mobile _token_list=array (' PROFILE/MIDP ', ' configuration/cldc-', ' 160x160 ', ' 176x220 ', ' 240x240 ', ' 240x320 ', ' 320x ' Up. ' Browser ', ' up. Link ', ' SymbianOS ', ' PalmOS ', ' PocketPC ', ' SonyEricsson ', ' Nokia ', ' BlackBerry ', ' Vodafone ', ' BenQ ', ' novarra-vision ', ' Iris ', ' NetFront ', ' htc_ ', ' Xda_ ', ' samsung-sgh ', ' Wapaka ', ' DoCoMo ', ' iPhone ', ' iPod ';
$found _mobile=checksubstrs ($mobile _os_list, $useragent _commentsblock) | | Checksubstrs ($mobile _token_list, $useragent);
if ($found _mobile) {
return true;
}else{
return false;
}
}
function Checksubstrs ($substrs, $text) {
foreach ($substrs as $substr) {
if (False!==strpos ($text, $substr)) {
return true;
}
return false;
}
}
if (IsMobile ()) {
echo ' Mobile login m.phpernote.com ';
}else{
echo ' Computer login www.phpernote.com ';
}

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