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Joost van Veen
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Lesson 16: static properties and methods
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‎16_statics/Acme/App/Administrator.php

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<?php
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namespace Acme\App;
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/**
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* This class extends Acme\App\User
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*/
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class Administrator extends User {
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public function __construct() {
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$this->isAdmin = true;
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}
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/**
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* Log in a user
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* @return string
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*/
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public function login(){
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// Login in our member using the logic in the parent class.
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$message = parent::login();
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// Add some administrator-spcific logic
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return $message . ' ... Log this action in an administrator\'s table';
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}
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/**
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* This method is for Administrators only
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*/
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public function reportForDuty ()
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{
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// Do stuff ...
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}
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}

‎16_statics/Acme/App/Member.php

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<?php
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namespace Acme\App;
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/**
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* This class extends Acme\App\User
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*/
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class Member extends User {
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/**
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* Log in a user
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* @return string
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*/
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public function login(){
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// Login in our member using the logic in the parent class.
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$message = parent::login();
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// Add some member-spcific logic
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return $message . ' ... Set a flag in the online members table';
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}
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}

‎16_statics/Acme/App/Repositories/PostDatabaseRepository.php

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<?php
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namespace Acme\App\Repositories;
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/**
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* The post repository that fetches posts from a database
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*/
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class PostDatabaseRepository implements PostRepositoryInterface
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{
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protected $db;
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public function __construct ()
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{
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// Store database connection
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}
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/**
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* @see \Acme\App\Repositories\PostRepositoryInterface::All()
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*/
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public function All ()
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{
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// Fetch all posts from db
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}
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/**
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* @see \Acme\App\Repositories\PostRepositoryInterface::Find()
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*/
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public function Find ($id)
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{
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// Fetch a single post from db
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}
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}
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‎16_statics/Acme/App/Repositories/PostJsonRepository.php

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<?php
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namespace Acme\App\Repositories;
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use stdClass;
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/**
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* The post repository that fetches posts from a json file
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*/
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class PostJsonRepository implements PostRepositoryInterface {
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protected $posts = array();
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/**
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* Config
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*/
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public function __construct() {
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$posts = json_decode(file_get_contents(dirname(__FILE__) . '/posts.json'), true);
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foreach ($posts as $key => $post){
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$this->posts[$key] = (object) $post;
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}
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}
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/**
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* @see \Acme\App\Repositories\PostRepositoryInterface::All()
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*/
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public function All ()
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{
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return $this->posts;
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}
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/**
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* @see \Acme\App\Repositories\PostRepositoryInterface::Find()
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*/
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public function Find ($id)
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{
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return isset($this->posts[$id]) ? $this->posts[$id] : new stdClass;
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}
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}

‎16_statics/Acme/App/Repositories/PostRepositoryInterface.php

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<?php
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namespace Acme\App\Repositories;
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/**
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* The contract for all post repositories. They must all use the emthods defined in this interface.
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*/
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interface PostRepositoryInterface {
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/**
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* Return all posts, as an array of objects
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* $post->title
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* $post->body
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*
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* @return array
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*/
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public function All();
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/**
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* Return a single post
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* $post->title
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* $post->body
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*
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* @param integer $id
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* @return object
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*/
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public function Find($id);
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}

‎16_statics/Acme/App/Repositories/PostRssRepository.php

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<?php
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namespace Acme\App\Repositories;
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use stdClass;
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/**
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* The post repository that fetches posts from an RSS feed
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*/
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class PostRssRepository implements PostRepositoryInterface {
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protected $posts = array();
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public function __construct() {
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$xml = simplexml_load_file(dirname(__FILE__) . '/posts.xml');
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$posts = $xml->xpath('channel/item');
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foreach ($posts as $key => $post){
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$post = json_decode(json_encode($post));
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$post->body = $post->description;
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unset($post->description);
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$this->posts[$key + 1] = $post;
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}
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}
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/**
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* @see \Acme\App\Repositories\PostRepositoryInterface::All()
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*/
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public function All ()
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{
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return $this->posts;
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}
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/**
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* @see \Acme\App\Repositories\PostRepositoryInterface::Find()
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*/
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public function Find ($id)
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{
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return isset($this->posts[$id]) ? $this->posts[$id] : new stdClass;
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}
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}

‎16_statics/Acme/App/Repositories/posts.json

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{
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"1": {
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"title":"This is my first post from json",
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"body":"Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum ut leo vitae urna eleifend fringilla. Ut tincidunt risus et orci viverra non accumsan urna bibendum. Fusce sagittis tortor eu justo fermentum egestas. Sed interdum, leo a tempus con."
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},
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"2": {
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"title":"This is my second post from json",
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"body":"Nullam eros odio, luctus et rutrum sed, varius ac enim. Aliquam nunc ante, lacinia sed porta nec, iaculis a ligula. Phasellus sagittis cursus purus, non interdum elit aliquam non. Nam lorem nibh, facilisis at scelerisque nec, tempus ac lacus maecena."
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},
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"3": {
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"title":"This is my third post from json",
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"body":"Nullam eros odio, luctus et rutrum sed, varius ac enim. Aliquam nunc ante, lacinia sed porta nec, iaculis a ligula. Phasellus sagittis cursus purus, non interdum elit aliquam non. Nam lorem nibh, facilisis at scelerisque nec, tempus ac lacus maecena."
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}
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}

‎16_statics/Acme/App/Repositories/posts.xml

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<?xml version="1.0" encoding="UTF-8" ?>
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<rss version="2.0">
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<channel>
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<item>
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<title>This is my first post from xml</title>
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<description>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum ut leo vitae urna eleifend fringilla. Ut tincidunt risus et orci viverra non accumsan urna bibendum. Fusce sagittis tortor eu justo fermentum egestas. Sed interdum, leo a tempus con.</description>
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</item>
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<item>
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<title>This is my second post from xml</title>
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<description>Nullam eros odio, luctus et rutrum sed, varius ac enim. Aliquam nunc ante, lacinia sed porta nec, iaculis a ligula. Phasellus sagittis cursus purus, non interdum elit aliquam non. Nam lorem nibh, facilisis at scelerisque nec, tempus ac lacus maecena.</description>
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</item>
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<item>
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<title>This is my third post from xml</title>
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<description>Nullam eros odio, luctus et rutrum sed, varius ac enim. Aliquam nunc ante, lacinia sed porta nec, iaculis a ligula. Phasellus sagittis cursus purus, non interdum elit aliquam non. Nam lorem nibh, facilisis at scelerisque nec, tempus ac lacus maecena.</description>
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</item>
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</channel>
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</rss>

‎16_statics/Acme/App/User.php

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<?php
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namespace Acme\App;
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abstract class User {
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/**
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* @var string
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*/
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protected $email;
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/**
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* @var string
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*/
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protected $password;
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/**
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* @var boolean
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*/
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protected $isAdmin = false;
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/**
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* All properties that can be set directly
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* @var array
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*/
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protected $fillable = array('email', 'password');
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/**
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* All properties that can be gotten directly
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* @var array
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*/
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protected $accessible = array('email', 'password');
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/**
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* Class configuration only
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* @param array $params
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*/
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public function __construct(Array $params = array()) {
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if (count($params)) {
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foreach ($params as $key => $value) {
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$this->$key = $value;
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}
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}
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}
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/**
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* Directly set inaccessible but existing properties, if in $this->fillable array
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* @param string $name
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* @param mixed $value
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* @return void
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*/
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public function __set ($name, $value) {
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// Do not set if not fillable
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if (! in_array($name, $this->fillable)) {
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return false;
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}
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if (isset($this->$name)) {
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$this->$name = $value;
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}
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}
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/**
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* Directly get inaccessible but existing properties, if in $this->accesible array
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* @param string $name
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* @return mixed
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*/
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public function __get ($name) {
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// Do not return if not accessible
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if (! in_array($name, $this->accessible)) {
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return NULL;
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}
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return isset($this->$name) ? $this->$name : NULL;
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}
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/**
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* Return accessible properties as a json object
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* @return string
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*/
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public function __toString () {
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$data = array();
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// Only add property accessible
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foreach ($this->accessible as $key) {
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$data[$key] = $this->$key;
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}
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return json_encode($data);
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}
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/**
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* Log in a user
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* @return string
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*/
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public function login(){
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return 'Logging in a user ...';
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}
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/**
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* Log in a user
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* @return string
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*/
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public function logout(){
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return 'Logging out ...';
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}
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}

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