web_2025/R3.01/tp/tp4/ex2/helpers.php

<?php
function initializeGame()
{
	// Une grille vide contient 9 cases valant 0.
	$_SESSION['grid'] = array_fill(0, 9, 0);
	$_SESSION['playerTurn'] = 1;
}

function nextPlayer($player)
{
	return $player === 1 ? 2 : 1;
}

function isWinner($grid, $player)
{
	$winStates = array(
		array(0, 1, 2), array(3, 4, 5), array(6, 7, 8),
		array(0, 3, 6), array(1, 4, 7), array(2, 5, 8),
		array(0, 4, 8), array(2, 4, 6)
	);

	foreach ($winStates as $winState) {
		if (
			$grid[$winState[0]] == $player &&
			$grid[$winState[1]] == $player &&
			$grid[$winState[2]] == $player
		) {
			return true;
		}
	}

	return false;
}

function noWinner($grid)
{
	for ($i = 0; $i < 9; $i++) {
		if ($grid[$i] == 0) {
			return false;
		}
	}

	return true;
}

function getWinner($grid)
{
	if (isWinner($grid, 1)) {
		return 1;
	}

	if (isWinner($grid, 2)) {
		return 2;
	}

	return 0;
}

function displayGrid($grid, $isInteractive = true)
{
	echo '<table class="morpion">';
	for ($i = 0; $i < 3; $i++) {
		echo '<tr>';
		for ($j = 0; $j < 3; $j++) {
			echo '<td>';

			$pos = 3 * $i + $j;
			if ($grid[$pos] == 0 && $isInteractive) {
				echo "<a href='?pos=$pos'></a>";
			}
			if ($grid[$pos] == 1) {
				echo '<i class="fa fa-times" aria-hidden="true"></i>';
			}
			if ($grid[$pos] == 2) {
				echo '<i class="fa fa-circle-o" aria-hidden="true"></i>';
			}

			echo '</td>';
		}
		echo '</tr>';
	}
	echo '</table>';
}