現在使用手機上網的人越來越多了，所以手機用戶給網站帶來流量也是非常可觀的。但是對于像我這樣的網站想讓手機訪問，那么體驗度一定會很差，因為該站的css樣式只適合用電腦瀏覽器訪問。所以我就研究怎么用php去判斷網頁是電腦訪問還是手機訪問，然后再通過去加載不同的css來達到手機和電腦都可以正常的訪問的效果。

<?php

function check_wap() {

if (isset($_SERVER['HTTP_VIA'])) return true;

if (isset($_SERVER['HTTP_X_NOKIA_CONNECTION_MODE'])) return true;

if (isset($_SERVER['HTTP_X_UP_CALLING_LINE_ID'])) return true;

if (strpos(strtoupper($_SERVER['HTTP_ACCEPT']),"VND.WAP.WML") > 0) {

// Check whether the browser/gateway says it accepts WML.

$br = "WML";

} else {

$browser = isset($_SERVER['HTTP_USER_AGENT']) ? trim($_SERVER['HTTP_USER_AGENT']) : '';

if(empty($browser)) return true;

$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-','160×160','176×220','240×240','240×320','320×240','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,$browser) ||

checkSubstrs($mobile_token_list,$browser);

if($found_mobile)

$br ="WML";

else $br = "WWW";

}

if($br == "WML") {

return true;

} else {

return false;

}

}

function checkSubstrs($list,$str){

$flag = false;

for($i=0;$i<count($list);$i++){

if(strpos($str,$list[$i]) > 0){

$flag = true;

break;

}

}

return $flag;

}

if(check_wap()){

echo "wap";

}else{

echo "web";

}

?>