How to use session in wordpress in plugin development

Question

I am new to write a plugin ..I am having a testplugin.php file and a ajax.php file ..

My code in testplugin.php is

global $session;

print_r($abc);          


        

Answer 1

In my case I was using that session variable in plugin activation as well. So did something unorthodox. Instead of defining my session_start in a hook I made it as the first line in my plugin :).

To heck with plugins, as soon as wordpress scans through my file it initiates the session.

At the end I do not destroy the session on user logout. I simply unset my variable. This is to just in case if some other plugin is also using session. If I destroy session it may affect other plugins.

Cheers.

Answer 2

// On your plugin or themes functions.php

function register_session(){
    if( !session_id() )
        session_start();
}
add_action('init','register_session');

// To set a SESSION data -

$_SESSION['arrayImg'] = $abc;

// To get the data on ajax hooked function -

function resolve_the_ajax_request(){
    if( !session_id())
        session_start();

    $abc = $_SESSION['arrayImg'];
}