PHP验证终端类型是否为手机的简单实例

实例如下：

    /**
     * 判断当前访问的用户是 PC端 还是 手机端 返回true 为手机端 false 为PC 端
     * @return boolean
     */
    function isMobile(){ 
      $useragent=isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : ''; 
      //echo $useragent;die;
      $useragent_commentsblock=preg_match('|\(.*?\)|',$useragent,$matches)>0?$matches[0]:'';    
      function CheckSubstrs($substrs,$text){ 
        foreach($substrs as $substr) 
          if(false!==strpos($text,$substr)){ 
            return true; 
          } 
          return false; 
      }
      $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,$useragent_commentsblock) || 
           CheckSubstrs($mobile_token_list,$useragent); 

      if ($found_mobile){ 
        return true; 
      }else{ 
        return false; 
      } 
    }

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