jQuery AJAX - Set PHP Session variable

Question

I am looking to store a variable across an entire session so that when a user closes a promotional bar it stays closed and doesn't pop back up every time they navigate to a new page.

On page load I have the following:

$.ajax
({ 
  url: 'promo.php',
  type: 'post',
  data : formData,
  success: function(result)
  {
    alert(result);
  }

});

The formData isn't too important right now as it isn't used.*

promo.php:

<?php

  if (isset($_SESSION['promoBar'])) {

    echo $_SESSION['promoBar'];

  }
  else {

    $_SESSION['promoBar'] = "closed";
    echo "does not exist";

  }

?>

The idea is that on page load it will check if the $_SESSION['promoBar'] variable exists, and if it does, return it's value. Otherwise set a value.

Currently the alert always displays does not exist. I was expecting it to display does not exist the first time and then closed each time I navigate to a new page.

What have I done wrong?

Where you are setting the session $_SESSION['promoBar'] and if so where do you have session_start ? — Sulthan Allaudeen
– Sulthan Allaudeen, Commented Jul 13, 2015 at 8:59

Deenadhayalan Manoharan · Accepted Answer · 2015-07-13 09:07:32Z

3

Try this... Use "session_start" before check

session_start();

  if (isset($_SESSION['promoBar'])) {

    echo $_SESSION['promoBar'];

  }
  else {

    $_SESSION['promoBar'] = "closed";
    echo "does not exist";

  }

?>

edited Jul 13, 2015 at 9:07

answered Jul 13, 2015 at 8:59

Deenadhayalan Manoharan

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2 Comments

Lee Over a year ago

Thanks! This worked great! Might be worth editing your code from "start_session" to "session_start"

Deenadhayalan Manoharan Over a year ago

check it and let me know

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