i am new in wordpress i am want to start a session in wordpress i am using this code in theme head to start session
<?php
add_action('init', 'register_my_session');
// session function
function register_my_session(){
if( !session_id() ) {
session_start();
}
}
// calling session function
register_my_session();
?>
if this code is ok then where i have to add this code in wordpress to start session