PHP 实现判断用户是否手机访问

随着移动设备的普及，网站也会迎来越来越多移动设备的访问。用适应PC的页面，很多时候对手机用户不友好，那么有些时候，我们需要判断用户是否用手机访问，如果是手机的话，就跳转到指定的手机友好页面。这里就介绍一下，如何判断用户是否用手机访问。
自定义的函数如下：
复制代码代码如下:
$agent = check_wap（）;
if（ $agent ）
{
header（"Location: http://www.nowamagic.net"）;
exit;
}
// check if wap
function check_wap（）{
// 先检查是否为wap代理，准确度高
if（stristr（$_SERVER["HTTP_VIA"],"wap"））{
      return true;
}
// 检查浏览器是否接受 WML.
elseif（strpos（strtoupper（$_SERVER["HTTP_ACCEPT"]）,"VND.WAP.WML"） > 0）{
      return true;
}
//检查USER_AGENT
elseif（preg_match（"/（blackberry|configuration/cldc|hp |hp-|htc |htc_|htc-|iemobile|kindle|midp|mmp|motorola|mobile|nokia|opera mini|opera |Googlebot-Mobile|YahooSeeker/M1A1-R2D2|android|iphone|ipod|mobi|palm|palmos|pocket|portalmmm|ppc;|smartphone|sonyericsson|sqh|spv|symbian|treo|up.browser|up.link|vodafone|windows ce|xda |xda_）/i", $_SERVER["HTTP_USER_AGENT"]））{
      return true;
}
else{
      return false;
}
}

再来一个从PHP框架剥离的判断是否为手机移动终端的函数：
复制代码代码如下:
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;
}

代码很简单，功能很实用，非常适合将其放入项目中，希望小伙伴们能够喜欢。