Session Introduction

<?php

  /*
    Sessions
    - Session Is Stored On The Server
    - Session Store Only A User Key In Cookie To Know Its You
    - Key Are Generated By PHP Engine So Its Almost Impossible To Guess
    - You Need To Add It Before Any Output
  */

  session_start();

  $_SESSION['name'] = "Ahmed";
  $_SESSION['id'] = 1005;

  echo '<pre>';
  print_r($_SESSION);
  echo '</pre>';

  echo '<a href="test.php">Test</a>';