手动重定向移动桌面版本

Question

I have this code in my homepage

<?php
 if(isset($_SESSION['mobile'])){
   if($_SESSION['mobile']==1){
     echo '
         <script>
           if( /Android|webOS|iPhone|iPad|iPod|BlackBerry/i.test(navigator.userAgent) ) {
             window.location = "mobile/index.php";
           }
         </script>';
   }
 }
 else{
   $_SESSION['mobile']=1;
   echo '
         <script>
           if( /Android|webOS|iPhone|iPad|iPod|BlackBerry/i.test(navigator.userAgent) ) {
             window.location = "mobile/index.php";
           }
         </script>';
 }
?>

and on the mobile version of my website, to get back to the destop version I inserted a link to this almost empty "redirect.php" page

<?php 
  $_SESSION['mobile']=0; 
  header("location: ../index.php");
  exit;
?>

but I am not getting the desired behavior: once I enter the website with my mobile, I am correctly redirected to the mobile version, but once I click on the link to get the desktop version, I loop back into the mobile version. What am I missing?

Thanks! :)

Answer 1

Remember to call session_start() function before using sessions.

Better use this to reduce code:

<?php session_start();

if (isset($_GET["desktop"])) {

    // DESKTOP
    $_SESSION["mobile"] = 0;
    ...

} else {

    // MOBILE
    if (!isset($_SESSION["mobile"])) { $_SESSION["mobile"] = 1; }
    if ($_SESSION["mobile"] == 1){ echo '<script>...</script>'; }
    ...

}
?>

And link to the homepage with ?desktop=1 to switch to the desktop version.

Answer 2

Based on your current code - You should have a separate session var that tell you that the user has manually reqeusted control.

<?php
if(!$_SESSION['manuall_overide'])
 if(isset($_SESSION['mobile'])){
   if($_SESSION['mobile']==1){
     echo '
         <script>
           if( /Android|webOS|iPhone|iPad|iPod|BlackBerry/i.test(navigator.userAgent) ) {
             window.location = "mobile/index.php";
           }
         </script>';
   }
 }
 else{
   $_SESSION['mobile']=1;
   echo '
         <script>
           if( /Android|webOS|iPhone|iPad|iPod|BlackBerry/i.test(navigator.userAgent) ) {
             window.location = "mobile/index.php";
           }
         </script>';
 }
}
?>

<?php 
  $_SESSION['manuall_overide']=1; 
  header("location: ../index.php");
  exit;
?>