Code:
<?php
/*
PHP to detect mobile phones
*/
function detect_mobile_device(){
// checks if the user agent claims to be windows but is windows mobile instead
if(stristr($_SERVER['HTTP_USER_AGENT'],'windows')&&!stristr($_SERVER['HTTP_USER_AGENT'],'windows ce')){
return false;
}
// check if the user agent gives away any tell tale signs it's a mobile browser
if(eregi('up.browser|up.link|windows ce|iemobile|mini|mmp|symbian|midp|wap|phone|pocket|mobile|pda|psp',$_SERVER['HTTP_USER_AGENT'])){
return true;
}
// check the http accept header to see if wap.wml or wap.xhtml support is claimed
if(stristr($_SERVER['HTTP_ACCEPT'],'text/vnd.wap.wml')||stristr($_SERVER['HTTP_ACCEPT'],'application/vnd.wap.xhtml+xml')){
return true;
}
// check if there are any tell tale signs it's a mobile device from the _server headers
if(isset($_SERVER['HTTP_X_WAP_PROFILE'])||isset($_SERVER['HTTP_PROFILE'])||isset($_SERVER['X-OperaMini-Features'])||isset($_SERVER['UA-pixels'])){
return true;
}
// build an array with the first four characters from the most common mobile user agents
$a = array(
'acs-'=>'acs-',
'alav'=>'alav',
'alca'=>'alca',
'amoi'=>'amoi',
'audi'=>'audi',
'aste'=>'aste',
'avan'=>'avan',
'benq'=>'benq',
'bird'=>'bird',
'blac'=>'blac',
'blaz'=>'blaz',
'brew'=>'brew',
'cell'=>'cell',
'cldc'=>'cldc',
'cmd-'=>'cmd-',
'dang'=>'dang',
'doco'=>'doco',
'eric'=>'eric',
'hipt'=>'hipt',
'inno'=>'inno',
'ipaq'=>'ipaq',
'java'=>'java',
'jigs'=>'jigs',
'kddi'=>'kddi',
'keji'=>'keji',
'leno'=>'leno',
'lg-c'=>'lg-c',
'lg-d'=>'lg-d',
'lg-g'=>'lg-g',
'lge-'=>'lge-',
'maui'=>'maui',
'maxo'=>'maxo',
'midp'=>'midp',
'mits'=>'mits',
'mmef'=>'mmef',
'mobi'=>'mobi',
'mot-'=>'mot-',
'moto'=>'moto',
'mwbp'=>'mwbp',
'nec-'=>'nec-',
'newt'=>'newt',
'noki'=>'noki',
'opwv'=>'opwv',
'palm'=>'palm',
'pana'=>'pana',
'pant'=>'pant',
'pdxg'=>'pdxg',
'phil'=>'phil',
'play'=>'play',
'pluc'=>'pluc',
'port'=>'port',
'prox'=>'prox',
'qtek'=>'qtek',
'qwap'=>'qwap',
'sage'=>'sage',
'sams'=>'sams',
'sany'=>'sany',
'sch-'=>'sch-',
'sec-'=>'sec-',
'send'=>'send',
'seri'=>'seri',
'sgh-'=>'sgh-',
'shar'=>'shar',
'sie-'=>'sie-',
'siem'=>'siem',
'smal'=>'smal',
'smar'=>'smar',
'sony'=>'sony',
'sph-'=>'sph-',
'symb'=>'symb',
't-mo'=>'t-mo',
'teli'=>'teli',
'tim-'=>'tim-',
'tosh'=>'tosh',
'treo'=>'treo',
'tsm-'=>'tsm-',
'upg1'=>'upg1',
'upsi'=>'upsi',
'vk-v'=>'vk-v',
'voda'=>'voda',
'wap-'=>'wap-',
'wapa'=>'wapa',
'wapi'=>'wapi',
'wapp'=>'wapp',
'wapr'=>'wapr',
'webc'=>'webc',
'winw'=>'winw',
'winw'=>'winw',
'xda-'=>'xda-'
);
// check if the first four characters of the current user agent are set as a key in the array
if(isset($a[substr($_SERVER['HTTP_USER_AGENT'],0,4)])){
return true;
}
}
function detect_iphone(){
if(eregi('iphone',$_SERVER['HTTP_USER_AGENT'])||eregi('ipod',$_SERVER['HTTP_USER_AGENT'])){
return true;
}
}
// example 1 - detect and redirect mobile browsers
if(detect_mobile_device()){
header('Location: http://yoursite.com/mobile');
exit;
}
// example 2 - detect and redirect desktop browsers
if(!detect_mobile_device()){
header('Location: http://yoursite.com/');
exit;
}
function detect_iphone(){
if(eregi('iphone',$_SERVER['HTTP_USER_AGENT'])){
return true;
}
}
// example 3 - send iphone to specific site
if(detect_iphone()){
header('Location: http://yoursite.com/iphone');
exit;
}
?> 
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