Answers for "how does php store session data"

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.";
?>

php session destroy

<?php
// Destroy the currently active session.
session_destroy();
?>

$_SESSION php example

<?php
session_start();
echo session_id();
?>