Echoing content of php session, then clearing it

[ArmyofHarmony]

Hi guys

Bit of a weird issue with PHP that only seems to affect Chrome and not Firefox.

I am trying to populate the contents of a json object using PHP.If someone signs up to my site, I create a PHP session variable identifying them as a new registration. They then get redirected back to the homepage using the header function.

On the homepage I have the below script. The correct output should read {regType' : 'normal'} (which works in Firefox). In Chrome it appears as 'blank' - which is odd as that session update only happens after the echo!

Any ideas?!

    <script>
              
      dataLayer = [
                  <?php
                   // session_start();
                    if(isset($_SESSION['register']) && !empty($_SESSION['register']))
                    {
                      $regtype = $_SESSION['register'];
                      echo "{'regType' : '" . $regtype . "'}";
                      $_SESSION['register'] = "blank";                 
                    }
                      ?>
                   
                   ];
      
    </script>

 

[ArmyofHarmony]

Unfortunately this seems to print nothing to the page :/

How about something like:

if (isset($_SESSION['register']))
{
    $regType = $_SESSION['register'];
    unset($_SESSION['register']);

    echo json_encode(compact('regType'));
}

 

[ArmyofHarmony]

If it is printing nothing then you have an issue with how you are setting the $_SESSION['register'] value.

When I remove the unset line, it prints as expected. The problem seems to be adding the unset seems to unset the variable before echoing anything

 

[ArmyofHarmony]

When you do the redirect using 'header' are you exiting the script immediately afterwards? It's possible that you're doing something after calling header which could be changing your session variable - if you're redirecting to the same page then the session variable could be being set to 'blank' before the redirect happens.

This is the code on the page before (register.php). I have tried adding die() and exit() and it doesn't seem to help. Note that the correct $_SESSION value appears when I remove "unset" on the page that the user gets redirected to. It's as if the unset line is appearing above the echo line so the variable ends up being blank. Not sure why this would happen

    if(isset($error))
    {
        header( 'Location:'. $actual_link . "?error=" . $error );
    }
    else
    {
    
        $password = hash('sha256',$password);
        
        $date = date("Y-m-d H:i:s");
        $sql="INSERT INTO users (user_name, user_password,user_email, user_join_date) VALUES ('$username', '$password','$email', '$date') ";
        mysql_query($sql);       
        $finduserid="SELECT user_id from users WHERE user_name = '$username'";
        $user_id = mysql_query($finduserid);
        $row = mysql_fetch_array($user_id);
        $user_id = $row['user_id'];
        $expire = time() + 31556926;
        setcookie("user_id",$user_id, $expire, '/');
        setcookie("password",$password, $expire, '/');
        $_SESSION["register"] = "normal";
        header( 'Location:'. $actual_link);
        die();
    }

 

[ArmyofHarmony]

Oh and just to reiterate - everything seems to work fine on Firefox, it's just chrome that's acting weird!!

 

[ArmyofHarmony]

Do you get any console errors in chrome?

None