Small Example Of A Game Inventory With PHP

InventoryGame.php

<?php
	// This example is a port of: https://gist.github.com/diazvictor/6fe3372bce79587a3c21123a19881cb1
	// I create the Inventory class
	class Inventory {
		// What to do when the class is initialized
		public function __construct() {
			$this->items = array();
		}

		/**
		 * I look at what I carry in my inventory
		 * @returns {Boolean} true or false if there are items
		 */
		public function getItems() {
			if ($this->items[0]) {
				echo "You carry:\n";
				foreach ($this->items as $inventory) {
					echo "* {$inventory["desc"]}\n";
				}
				return true;
			} else {
				echo "You have nothing.";
				return false;
			}
		}

		/**
		 * I check if an item exists
		 * @param {String} item name
		 * @returns {Boolean} true or false if the item exists
		 */
		public function hasItem ($name) {
			foreach ($this->items as $inventory) {
				if ($name == $inventory["name"]) {
					return true;
				}
			}
			return false;
		}

		/**
		 * I add an item to the inventory
		 * @param {String} item name
		 * @param {String} item description
		 * @returns {Number} the number of items in the inventory
		 */
		public function addItem ($name, $desc) {
			array_push($this->items, array(
				"name" => $name,
				"desc" => $desc
			));
			return count($this->items);
		}

		/**
		 * I remove an item from inventory
		 * @param {String} item name
		 * @returns {Boolean} true or false if the item has been removed successfully
		 */
		public function removeItem ($name) {
			foreach ($this->items as $i => $inventory) {
				if ($name == $inventory["name"]) {
					unset($this->items[$i]);
					return true;
				}
			}
			return false;
		}
	}

	class BackPack extends Inventory {
		/**
		 * I add an item to the inventory but first I check if the limit has not
		 * been reached.
		 * @param {String} item name
		 * @param {String} item description
		 * @returns {Number} the number of items in the inventory
		 */
		public function addItem ($name, $desc) {
			$this->size = 10;
			if (count($this->items) >= $this->size) {
				echo "backpack is full";
				return false;
			} else {
				parent::addItem($name, $desc);
				return true;
			}
		}
	}

	$player = new BackPack();
	
	$player->addItem("lantern", "an oil lantern");
	$player->addItem("camera", "a camera, it seems to be discharged");
	$player->addItem("sword", "a sword with the blessing of the wind");

	$player->getItems();
?>