PHP 判断手机端还是web端

function isMobile(){
// 如果有HTTP_X_WAP_PROFILE则一定是移动设备
if (isset ($_SERVER['HTTP_X_WAP_PROFILE']))
return true; //此条摘自TPM智能切换模板引擎，适合TPM开发
if(isset ($_SERVER['HTTP_CLIENT'])
&&'PhoneClient'==$_SERVER['HTTP_CLIENT'])
return true;
//如果via信息含有wap则一定是移动设备,部分服务商会屏蔽该信息
if (isset ($_SERVER['HTTP_VIA']))
//找不到为flase,否则为true
return stristr($_SERVER['HTTP_VIA'],
'wap') ? true : false;
//判断手机发送的客户端标志,兼容性有待提高
if (isset ($_SERVER['HTTP_USER_AGENT'])) {
$clientkeywords = array(
'nokia','sony','ericsson','mot','samsung','htc','sgh','lg','sharp','sie-','philips','panasonic','alcatel','lenovo','iphone','ipod','blackberry','meizu','android','netfront','symbian','ucweb','windowsce','palm','operamini','operamobi','openwave','nexusone','cldc','midp','wap','mobile'
);
//从HTTP_USER_AGENT中查找手机浏览器的关键字
if (preg_match("/("
. implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT'])))
{
return true;
}
}
//协议法，因为有可能不准确，放到最后判断
if (isset ($_SERVER['HTTP_ACCEPT'])) {
// 如果只支持wml并且不支持html那一定是移动设备
// 如果支持wml和html但是wml在html之前则是移动设备
if ((strpos($_SERVER['HTTP_ACCEPT'],
'vnd.wap.wml') !== false) && (strpos($_SERVER['HTTP_ACCEPT'],
'text/html') === false || (strpos($_SERVER['HTTP_ACCEPT'],
'vnd.wap.wml') < strpos($_SERVER['HTTP_ACCEPT'],
'text/html')))) {
return true;
}
}
return false;
}
//判断是pc端还是手机端
if(isMobile()){
C('DEFAULT_V_LAYER','Mobile');
}