判斷是否是手機等移動端訪問

CI控制判斷判斷，並存入session，為以後其它訪問頁面，判斷session值是否為"yes" 繼續，顯示移動端樣式頁面或電腦端樣式頁面

public function index(){// '手機訪問'; if(stripos($_SERVER['HTTP_USER_AGENT'],"android")!=false||stripos($_SERVER['HTTP_USER_AGENT'],"ios")!=false||stripos($_SERVER['HTTP_USER_AGENT'],"wp")!=false){  //echo '手機訪問'; //echo '<script>alert("您現在使用的是行動裝置訪問， \n建議開啟螢幕橫向顯示進行報名。");</script>';     $_SESSION["ismobile"]="yes"; //echo $_SESSION['ismobile']; $className = new Clubfront2();$className->index(); }else //電腦訪問 {$className = new Clubfront2();$className->index(); }}}

另一種寫法

<?phpfunction isMobile(){  $useragent=isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';  $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;  }  }if (isMobile())echo '手機登入m.php100.com';elseecho '電腦登入www.php100.com';?>