Dragon-Knight/src/actions/explore.php

<?php

// explore.php :: Handles all map exploring, chances to fight, etc.

function move()
{
    global $userrow, $controlrow;

    if ($userrow["currentaction"] == "Fighting") { redirect('/fight'); }

    $latitude = $userrow["latitude"];
    $longitude = $userrow["longitude"];

	$form = validate($_POST, [
		'direction' => ['in:north,west,east,south']
	]);
	if (!$form['valid']) display(ul_from_validate_errors($form['errors']), 'Move Error');
	$d = $form['data']['direction'];

    if ($d === 'north') { $latitude++; if ($latitude > $controlrow["gamesize"]) { $latitude = $controlrow["gamesize"]; } }
    if ($d === 'south') { $latitude--; if ($latitude < ($controlrow["gamesize"]*-1)) { $latitude = ($controlrow["gamesize"]*-1); } }
    if ($d === 'east') { $longitude++; if ($longitude > $controlrow["gamesize"]) { $longitude = $controlrow["gamesize"]; } }
    if ($d === 'west') { $longitude--; if ($longitude < ($controlrow["gamesize"]*-1)) { $longitude = ($controlrow["gamesize"]*-1); } }

	$town = get_town_by_xy($longitude, $latitude);
    if ($town !== false) {
        Towns\travelto($town['id'], false);
        return;
    }

    $chancetofight = rand(1, 5);
	$action = $chancetofight === 1 ? "currentaction='Fighting', currentfight='1'," : "currentaction='Exploring',";

	db()->query("UPDATE users SET $action latitude = ?, longitude = ?, dropcode = 0 WHERE id = ?;", [$latitude, $longitude, $userrow['id']]);
    redirect('/');
}