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PHP 8 upgrade

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Game File Reference



Useful Components

Official

  • Deck: a PHP component to manage cards (deck, hands, picking cards, moving cards, shuffle deck, ...).
  • Draggable: a JS component to manage drag'n'drop actions.
  • Counter: a JS component to manage a counter that can increase/decrease (ex: player's score).
  • ExpandableSection: a JS component to manage a rectangular block of HTML than can be displayed/hidden.
  • Scrollmap: a JS component to manage a scrollable game area (useful when the game area can be infinite. Examples: Saboteur or Takenoko games).
  • Stock: a JS component to manage and display a set of game elements displayed at a position.
  • Zone: a JS component to manage a zone of the board where several game elements can come and leave, but should be well displayed together (See for example: token's places at Can't Stop).

Undocumented component (if somebody knows please help with docs)

  • Wrapper: a JS component to wrap a <div> element around its child, even if these elements are absolute positioned.

Unofficial



Game Development Process



Guides for Common Topics



Miscellaneous Resources

Starting in 2023-12, BGA began upgrading game servers from PHP 7.4 to PHP 8.2. See https://boardgamearena.com/forum/viewtopic.php?t=33940 for more information.

As of 2024-08-09, the BGA upgrade to PHP 8.2 is complete. Your game can now use PHP 8-specific features. 🎉

Fix your game's code

Here are a few common scenarios that may make your game incompatible with PHP 8 and how to fix them:

implode argument order

📖 See https://www.php.net/manual/en/function.implode.php

The signature of this function is implode(string $separator, array $array): string. PHP 7 accepted the arguments in either order, but PHP 8 requires the string argument first and the array argument second.

Static calls to non-static methods

📖 See https://php.watch/versions/8.0/non-static-static-call-fatal-error and https://www.php.net/manual/en/language.oop5.basic.php

PHP 8 no longer allows non-static class methods to be called statically. This may affect your game if you've created a class which extends APP_GameClass and you call various BGA framework functions statically using self::.

If possible, the simplest change is to replace self:: with $this-> (which refers to the current instance of your game class). This works if your function is non-static.

Non-compliant example:

   class NMap extends APP_GameClass {
       public function getPossibleMoves($playerId) {
           $planeHasNervous = intval(self::getUniqueValueFromDB("SELECT COUNT(1) FROM `pax` WHERE `player_id` = $playerId AND `status` = 'SEAT' AND `vip` = 'NERVOUS'")) > 0;

Fix:

   class NMap extends APP_GameClass {
       public function getPossibleMoves($playerId) {
           $planeHasNervous = intval($this->getUniqueValueFromDB("SELECT COUNT(1) FROM `pax` WHERE `player_id` = $playerId AND `status` = 'SEAT' AND `vip` = 'NERVOUS'")) > 0;

Otherwise, if your own function is static and $this-> doesn't exist, you can create a static variable like $instance in your game class, populate the variable in your game's constructor, and call the BGA framework functions through this variable.

Non-compliant example:

   class PlayerMgr extends APP_GameClass {
       public static function getMaxScore() {
           return self::getUniqueValueFromDB("SELECT MAX(player_score) FROM player WHERE player_eliminated = 0 AND player_zombie = 0");
       }

Fix:

   class hardback extends Table {
       public static $instance = null;
       function __construct() {
           parent::__construct();
           self::$instance = $this;
   class PlayerMgr extends APP_GameClass {
       public static function getMaxScore() {
           return hardback::$instance->getUniqueValueFromDB("SELECT MAX(player_score) FROM player WHERE player_eliminated = 0 AND player_zombie = 0");
       }