PHP判断当前页面是电脑登录，还是手机登录

//判断是否是电脑登录，还是手机登录
public function isMobil()
{
$useragent = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';
$useragent_commentsblock = preg_match('|\(.*?\)|', $useragent, $matches) > 0 ? $matches[0] : '';
$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 = $this->CheckSubstrs($mobile_os_list, $useragent_commentsblock) ||
$this->CheckSubstrs($mobile_token_list, $useragent);
if ($found_mobile)
{
echo '手机登录';
}
else
{
echo '电脑登录';
}
}