Cacher is the code snippet organizer for pro developers

<?php
class seaBot
{
    private $map = [];
    private $true_cell = [];
    private $game_id = '';
    public function __construct($game_id)
    {
        $this->game_id = $game_id;
        if (!$this->load()) {
            $this->init();
            $this->save();
        }
    }
    public function getCell()
    {
        $cell_index = rand(0, count($this->map) - 1);
        $cell = $this->map[$cell_index];
        unset($this->map[$cell_index]);
        $this->map = array_values($this->map);
        return $cell;
    }
    public function init()
    {
        for ($x = 0; $x < 10; $x++) {
            for ($y = 0; $y < 10; $y++) {
                $this->map[] = [$x, $y];
            }
        }
    }
    public function save()
    {
        $data = [
            'map' => $this->map,
            'true_cell' => $this->true_cell
        ];
        $c = new Memcached();
        $c->addServer('localhost', 11211);
        $c->set($this->game_id, $data, 60);
    }
    public function load()
    {
        $c = new Memcached();
        $c->addServer('localhost', 11211);
        $data = $c->get($this->game_id);
        if ($data) {
            $this->map = $data['map'];
            $this->true_cell = $data['true_cell'];
            return true;
        }
        return false;
    }
    public function __destruct()
    {
        $this->save();
    }
}
$json = file_get_contents("php://input");
if (empty($json)) {
    exit;
}
$data = json_decode($json);
$game_id = $data->game_id;
$command = $data->game_command;
$game_id .= $_GET['bot_name'];
if ($game_id) {
    $sea_bot = new seaBot($game_id);
}
else {
    exit;
}
if ($command == 'start_new_game') {
    echo json_encode(['response' => 'ok']);
}
if ($command == 'get_ship_location') {
    $ship_location = [
        [[0, 0]],
        [[3, 1]],
        [[5, 1]],
        [[7, 1]],
        [[2, 3], [1, 3]],
        [[4, 3], [5, 3]],
        [[7, 3], [8, 3]],
        [[1, 5], [2, 5], [3, 5]],
        [[5, 5], [6, 5], [7, 5]],
        [[1, 7], [2, 7], [3, 7], [4, 7]]
    ];
    echo json_encode(['ship_array' => $ship_location]);
}
if ($command == 'make_move') {
    echo json_encode(['response' => $sea_bot->getCell()]);
}