How to get session variables in wordpress plugins

Question

Hi iam new to wordpress and I have created a plugin at which I need to print all the session data.First I have created a file in plugin folder and added code like

function myplugin_classname() {
    print_r($_SESSION);
}

And I put an click event for two button with class tags like

$('.tags').on('click',function(){
     $.post('my_page.php',{val:$(this).val()});
});

and in my_page.php I kept like

$_SESSION['tag'] = $_POST['val'];

but when it comes to printing the session variables at myplugin_classname (by refreshing the page)it doesnt prints the newly assigned session variable....How to solve this..??I have started session through theme-my-login login.

Answer 1

You need to add <?php session_start(); ?> at beginning of my_page.php

After that for destroying session you can use wp_logout action in wordpress. code is as follows

<?php function custom_unset_session() {
   // your code 
   unset($_SESSION['tag']);
} 
add_action('wp_logout', 'custom_unset_session');
?>