how to unset the session in php code example

Example 1: php unset session variable

// Destroy a sesion variable name 'variable_name' 
<?php
unset($_SESSION['variable_name']);
?>

Example 2: php delete session

session_destroy(); // To delete whole session
// OR
unset($_SESSION['myVar']); // To delete a session var

Example 3: unset session in php

session_unset();    //Destrol all session variables