PHP中通过HTTP_USER_AGENT判断是否为手机移动终端的函数代码

　　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_agents = array(

　　'w3c ','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',

　　'wapr','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 is on Windows

　　if(strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'windows') !== false)

　　$mobile_browser=0;

　　// But WP7 is also Windows, with a slightly different characteristic

　　if(strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'windows phone') !== false)

　　$mobile_browser++;

　　if($mobile_browser>0)

　　return true;

　　else

　　return false;

　　}

　　function browsers(){

　　global $HTTP_USER_AGENT ;

　　if (isset($HTTP_USER_AGENT)){

　　$sAgent = $HTTP_USER_AGENT;

　　}else{

　　$sAgent = $_SERVER['HTTP_USER_AGENT'];

　　}

　　if (strpos($sAgent,'MSIE') !== false && strpos($sAgent,'mac') === false && strpos($sAgent,'Opera') === false){

　　$iVersion = (float)substr($sAgent,strpos($sAgent,'MSIE') + 5,3);

　　return ($iVersion >= 5.5) ;

　　}else if (strpos($sAgent,'Gecko/') !== false){

　　$iVersion = (int)substr($sAgent,strpos($sAgent,'Gecko/') + 6,8);

　　return ($iVersion >= 20030210) ;

　　}else{

　　return false;

　　}

　　}