PHP判断移动设备来源的方法
PHP判断移动设备来源的方法
现在移动设备大热的年代,可能我们在做web前端开发的时候经常会需要用到对移动设备的页面匹配。当然我们可以用响应式页面设计来处理前端的匹配问题,但是响应式页面只是不显示某些代码,但是还是会加载到用户的移动设备中。为了更好的照顾到用户手机浏览的体验,减少不必要的加载。我们可以再通过PHP的方式来减少用户的代码加载,提高用户浏览页面时的体验。由于现在移动设备的种类繁多、而且浏览器五花八门,所以仅仅是通过User-Agent来判断已经不能完全解决问题了。
function isMobile()
{
// 如果有HTTP_X_WAP_PROFILE则一定是移动设备
if (isset ($_SERVER['HTTP_X_WAP_PROFILE']))
{
return true;
}
// 如果via信息含有wap则一定是移动设备,部分服务商会屏蔽该信息
if (isset ($_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')
{
return true;
}
}
return false;
}
?>
目前这个方法可以用于大多数的移动设备判断,使用时也可以根据需要自行添加一些UA的判断参数。

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