2. Explain the process of destroying a single session variable and the process of destroying the entire session with suitable examples of each

Example 1: php delete session

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

Example 2: create session in php

<?php 
  // Start the session
  session_start();

  // Set session variables
  $_SESSION["color"]= "blue";
  $_SESSION["animal"]= "dog";
  echo "The session variable are set up.";
?>