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Simple Snakes and Ladders Game Implemented in PHP
<?php
function new_game($players, $mode = 'Easy', $board_size = 100)
{
$game_modes = ["Easy" => 5, "Medium" => 10, "Hard" => 20];
$snakes_ladders = random_board($game_modes[$mode], $board_size);
play($players, $snakes_ladders, $board_size);
}
function play($players, $snakes_ladders, $board_size)
{
$players_positions = array_map(function () {return 0;}, $players);
$starting_player = rand(1, count($players)) - 1;
$winner = move($players, $players_positions, $starting_player, $snakes_ladders, $board_size);
echo $players[$winner] . " won!";
}
function throw_dice()
{
return rand(1, 6);
}
function move($players, $player_positions, $player_turn, $snakes_ladders, $board_size)
{
$new_position = $player_positions[$player_turn] + throw_dice();
if (array_key_exists($new_position, $snakes_ladders))
$new_position = $snakes_ladders[$new_position];
if ($new_position == $board_size) return $player_turn;
$player = $players[$player_turn];
if ($new_position < $board_size) {
echo "Move $player to $new_position <br>";
$player_positions[$player_turn] = $new_position;
} else
echo "Skipping player $player <br>";
$next_player = next_player($player_turn, $player_positions);
return move($players, $player_positions, $next_player, $snakes_ladders, $board_size);
}
function next_player($player_turn, $player_positions)
{
return ($player_turn + 1) % count($player_positions);
}
function random_board($no_of_snakes_ladders, $board_size)
{
$snakes_ladders = [];
for ($i = 0; $i < $no_of_snakes_ladders; $i++) {
list($start, $end) = snake_or_ladder($board_size);
$snakes_ladders[$start] = $end;
}
return $snakes_ladders;
}
function snake_or_ladder($board_size)
{
$start = random_cell_value($board_size);
$ending = random_cell_value($board_size);
if ($start != $ending) return [$start, $ending];
return snake_or_ladder($board_size);
}
function random_cell_value($board_size)
{
return rand(1, $board_size);
}
$players = ["PHP", "Julia", "APL", "Erlang", "Clojure", "Scala"];
// new_game($players); - Easy Mode
new_game($players, "Hard", 200);
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