PHP Unset Session Variable
PhpSessionPhp Problem Overview
I'm a noob programmer so I apologies in advance for any obvious mistakes. I've spent the past week creating a product database kinda thing. I've got too the point where I can add products using a form, view all products added etc. I've being using sessions which are created via the form input data. I'm struggling to include get a delete product page working, I've tried using unset to clear the variable but can't get it too work.
ADD Product page which sets the session variable:
$_SESSION['Products'][] = $_POST; //is how i set the session on the add products page.
unset $_SESSION['Products'][]; //is how i have tried to clear the session although it does not work.
Any point in the right direction will be appreciated!
Php Solutions
Solution 1 - Php
You can unset session variable using:
session_unset- Frees all session variables (It is equal to using:$_SESSION = array();for older deprecated code)unset($_SESSION['Products']);- Unset only Products index in session variable. (Remember: You have to use like a function, not as you used)session_destroy— Destroys all data registered to a session
To know the difference between using session_unset and session_destroy, read this SO answer. That helps.
Solution 2 - Php
Unset is a function. Therefore you have to submit which variable has to be destroyed.
unset($var);
In your case
unset ($_SESSION["products"]);
If you need to reset whole session variable just call
session_destroy ();
Solution 3 - Php
I am including this answer in case someone comes to this page for the same reason I did. I just wasted an embarrassing amount of time trying to track the problem down. I was calling:
unset($_SESSION['myVar']);
from a logout script. Then navigating to a page that required login, and the server still thought I was logged in. The problem was that the logout script was not calling:
session_start();
Unsetting a session var DOES NOT WORK unless you start the session first.
Solution 4 - Php
If you completely want to clear the session you can use this:
session_unset();
session_destroy();
Actually both are not neccessary but it does not hurt.
If you want to clear only a specific part I think you need this:
unset($_SESSION['Products']);
//or
$_SESSION['Products'] = "";
depending on what you need.
Solution 5 - Php
unset is a function, not an operator. Use it like unset($_SESSION['key']); to unset that session key. You can, however, use session_destroy(); as well. (Make sure to start the session with session_start(); as well)
Solution 6 - Php
Destroying a PHP Session
A PHP session can be destroyed by session_destroy() function. This function does not need any argument and a single call can destroy all the session variables. If you want to destroy a single session variable then you can use unset() function to unset a session variable.
Here is the example to unset a single variable
<?php unset($_SESSION['counter']); ?>
Here is the call which will destroy all the session variables
<?php session_destroy(); ?>
Solution 7 - Php
// set
$_SESSION['test'] = 1;
// destroy
unset($_SESSION['test']);
Solution 8 - Php
$_SESSION['Poducts'] = 1; // set
unset($_SESSION['Products']); //unset