Example for dpurser-dev

index.php

<?php

session_start();

# Check if a game is in progress
if (!isset($_SESSION['game_board'])) {
    # If not, set up a new game board
    $_SESSION['game_board'] =
        array(
            array(0,0,0),
            array(0,0,0),
            array(0,0,0)
        );

    $_SESSION['turn_count'] = 0;
}

# Retrieve the game board from the session data
$game_board = $_SESSION['game_board'];

# Load the view
require 'index-view.php';

process.php

<?php

session_start();

# Get the game board from the session storage
$game_board = $_SESSION['game_board'];
$turn_count = $_SESSION['turn_count'];

# Take the coordinates from the player's input
$row = $_POST['row'];
$col = $_POST['col'];

# Update the game board with the player's move
$game_board[$row][$col] = "X";

# Generate the computer's move (except when there are no moves left)
if($turn_count < 4) {
    while(!isset($found_available_move)) {

        # Generate a random set of coordinates
        $row = rand(0, 2);
        $col = rand(0, 2);

        # Check that this is a valid move
        if ($game_board[$row][$col] == 0) {
            # If so, update the board and the exit the loop
            $game_board[$row][$col] = "O";
            $found_available_move = true;
        }
    };
}

$_SESSION['game_board'] = $game_board;
$_SESSION['turn_count']++;

# Load the view
header('Location: index.php');