Dynamische Websites. Week 7
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- Ada Hall
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1 Dynamische Websites Week 7
2 Lesschema Herhaling Front Controller AGENDA
3 LESSCHEMA Lesweek 7: Framework - Front Controller Lesweek 8: Framework - 2 Step Design Lesweek 9: Framework - Forms en... Lesweek 10: Framework - Vragen Lesweek 11: Extra topics Lesweek 12: Herhaling belangrijkste concepten Lesweek 13: Vragen en uitleg examen
4 Lesschema Herhaling Front Controller AGENDA
5 DB GEGEVENS <?php date_default_timezone_set('europe/brussels'); // local_u via webontwerp => 'host' => 'localhost' // u via mamp, wamp, xampp => 'host' => 'gegevensbanken.khleuven.be' require_once('../../../../.db_password.php'); $db_config = array( 'driver' => 'pgsql', 'username' => $username, 'password' => $password, 'schema' => 'public', // dit moet je veranderen naar je eigen schema 'dsn' => array( 'host' => 'gegevensbanken.khleuven.be', 'dbname' => 'webontwerp', // dit moet je veranderen naar db van je reeks 'port' => '51314', ) );
6 .DB_PASSWORD.PHP.db_password.php <?php $dbuser = "local_u "; $dbpassword = "Qpnu7dj9YOio";?> hidden nu reeds op server
7 AGENDA Lesschema Herhaling Front Controller
8 FRONT CONTROLLER = is een dispatching controller naar wie alle requests worden gedaan alles gaat via index.php controllers, actions en parameters worden hieraan meegegeven Front_Controller_pattern
9 FRONT CONTROLLER VIA $_GET EN IF Voorbeelden Zie dynweb2013examples/theorie07/ frontcontroller_stap01
10 VOORBEELD HOME
11 INDEX.PHP <?php require_once('controller.php'); $controller = new Controller(); $controller->run(); Code Onveranderd
12 CONTROLLER.PHP <?php class Controller{ private $_vehicles; private $_vehiclemapper;... public function run(){ $nextpage = 'index.php'; if ($this->_action == 'register') { $nextpage = $this->register(); elseif ($this->_action == 'new') { $nextpage = $this->newregistration(); elseif ($this->_action == 'home') { $nextpage = $this->home(); require_once($nextpage);... Code Onveranderd
13 CONTROLLER.PHP...?> private function home() { return 'home.php'; Code Onveranderd
14 HOME.PHP <body> <h1>welkom!</h1> <a href="index.php?action=new">registreer voertuig</a> </body> Code Onveranderd
15 FRONT CONTROLLER VIA $_GET EN IF Uitbreiding als we een detail pagina willen toevoegen waarmee we alle informatie van dat specifiek vehicle willen tonen
16 FRONT CONTROLLER VIA $_GET EN IF Problemen? run methode wordt veel te lang voldoet niet aan het Open-Closed principe nieuwe functionaliteit kunnen toevoegen door zo weinig mogelijk bestaande code aan te passen
17 FRONT CONTROLLER OO VIA $_GET Controller if-then-else structuur eruit halen delegeren naar een controller per onderwerp (bijvoorbeeld vehicle) maakt code herbruikbaarder en uitbreidbaarder
18 FRONT CONTROLLER OO VIA $_GET Voorbeelden controller=vehicle&action=new controller=vehicle&action=detail&id=1 Zie dynweb2013examples/theorie07/ frontcontroller_stap02
19 VOORBEELD VEHICLE OVERVIEW controller=vehicle&action=index $object = VehicleController ; $method = index ; $object = new $object(); $object->$method();
20 INDEX.PHP <?php require_once('controller.php'); $controller = new Controller(); $controller->run(); Code Onveranderd
21 CONTROLLER.PHP <?php class Controller{ public function run() { define('default_controller', 'home'); define('default_action', 'index'); // getting the requested controller from $_GET['controller'] $controller = (isset($_get['controller']))? $_GET['controller'] : DEFAULT_CONTROLLER; // setting the object and including the controller objectfile $object = ucfirst(strtolower($controller)); $file = $object. 'Controller'. '.php'; require_once($file); // getting the requested action frm $_GET['action'] $method = (isset($_get['action']))? $_GET['action'] : DEFAULT_ACTION; $object = $object. 'Controller'; // creating the controller as an instance of the controller object $object = new $object(); // executing the method $object->$method(); $object = Vehicle ; $file = VehicleController.php $method = index ; $object = VehicleController $object = new $object(); $object->$method();
22 VEHICLECONTROLLER.PHP <?php class VehicleController { private $_vehiclemapper; public function construct() { $this->_vehiclemapper = new VehicleMapper(); public function index() { $vehicles = $this->_vehiclemapper->getall(); require_once('vehicle_overview.php'); public function detail() {... public function add() {... public function register() {...
23 <?php require_once('db.php'); require_once('vehicle.php'); class VehicleMapper { private $_db; VEHICLEMAPPER.PHP public function construct() { $this->_db = Db::getInstance(); public function add($object) {... public function getall() { $sql = "SELECT * FROM vehicles"; $data = $this->_db->query($sql); $objects = array(); foreach ($data as $row) { $object = new Vehicle($row['color'], $row['brand']); $objects[] = $object; return $objects; Code Onveranderd
24 VEHICLE.PHP <?php class Vehicle { private $color; private $brand;?> public function construct($color = 'blauw', $brand = 'audi') { $this->setcolor($color); $this->setbrand($brand); public function tostring() { return 'een voertuig met de kleur '. $this->getcolor(). ' en het merk '. $this->getbrand(); public function setcolor($color){ $this->color = $color; public function getcolor(){ return $this->color; public function setbrand($brand){ $this->brand = $brand; public function getbrand(){ return $this->brand; Code Onveranderd
25 VEHICLE_OVERVIEW.PHP <!DOCTYPE html> <html> <body> <a href="index.php?controller=home&action=home">home</a> <a href="index.php?controller=vehicle&action=add">nieuwe registratie</a> <br/> <br/> <table> <th>kleur</th> <th>merk</th> <?php foreach ($vehicles as $vehicle) {?> <tr> <td><?php echo $vehicle->getcolor();?></td> <td><?php echo $vehicle->getbrand();?></td> </tr> <?php?> </table> </body> </html>
26 FRONT CONTROLLER OO VIA $_GET Uitbreiding als we een detail pagina willen toevoegen waarmee we alle informatie van dat specifiek vehicle willen tonen
27 FRONT CONTROLLER OO VIA $_GET Problemen? URLs worden te lang en minder leesbaar URLs niet conform de standaard
28 FRONT CONTROLLER ZONDER $_GET Leesbaarheid verhogen van URLs
29 FRONT CONTROLLER ZONDER $_GET Voorbeelden Zie dynweb2013examples/theorie07/ frontcontroller_stap03
30 FRONT CONTROLLER ZONDER $_GET 2 stappen Stap 1: de webserver zeggen dat alles via index.php moet gaan altijd Stap 2: alle informatie uit de URL halen en mappen op de juiste controller, action en parameters
31 STAP 1 via mod-rewrite van apache (webserver).htaccess file maken met daar code in
32 .HTACCESS RewriteEngine On // activate the rewrite engine RewriteCond %{REQUEST_FILENAME -s [OR] // if (requested filename is a file with a size > 0 RewriteCond %{REQUEST_FILENAME -l [OR] // or requested filename is a symbolic link RewriteCond %{REQUEST_FILENAME -d // or requested filename is a directory) RewriteRule ^.*$ - [NC,L] // then show the requested filename RewriteRule ^.*$ index.php [NC,L] // else redirect to index.php page
33 STAP 2 Mappen structuur volgens MVC patroon application controller model view system controller model view
34 STAP 2 Controller klasse wordt gerefactord
35 VOORBEELD VEHICLE DETAIL
36 INDEX.PHP <?php session_start(); // constanten ivm de paths define('application_path', 'application/'); define('system_path', 'system/'); require_once(application_path. 'config.php'); require_once(system_path. 'model/db.php'); require_once(system_path. 'controller/controller.php'); $controller = new Controller(); $controller->run();
37 CONTROLLER.PHP <?php class Controller { const DEFAULT_CONTROLLER = "Home"; const DEFAULT_ACTION = "index"; const CONTROLLER_PATH = 'application/controller/'; const CONTROLLER_FILE = 'index.php'; private $controller = self::default_controller; private $action = self::default_action; private $params = array(); public function construct() { $this->parseuri();
38 CONTROLLER.PHP private function parseuri() { // strip the controllerfile out of the scriptname $scriptprefix = str_replace(self::controller_file, '', $_SERVER['SCRIPT_NAME']); $uri = str_replace(self::controller_file, '', $_SERVER['REQUEST_URI']); // get the part of the uri, starting from the position after the scriptprefix $path = substr($uri, strlen($scriptprefix)); // strip non-alphanumeric characters out of the path $path = preg_replace('/[^a-za-z0-9]\//', "", $path); // trim the path for / $path = trim($path, '/'); $_SERVER[ SCRIPT_NAME ] = /2013/lessons/theorie07/frontcontroller_stap03/index.php $_SERVER[ REQUEST_URI ] = /2013/lessons/theorie07/frontcontroller_stap03/vehicle/detail/1 $scriptprefix = /2013/lessons/theorie07/frontcontroller_stap03/ $uri = /2013/lessons/theorie07/frontcontroller_stap03/vehicle/detail/1 $path = vehicle/detail/1
39 CONTROLLER.PHP // explode the $path into three parts to get the controller, action and parameters // is used to supress errors when the function after it $action, $params) = explode("/", $path, 3); if (isset($controller)) { $this->setcontroller($controller); if (isset($action)) { $this->setaction($action); if (isset($params)) { $this->setparams(explode("/", $params)); $controller = vehicle $action = detail $params = 1
40 CONTROLLER.PHP private function setcontroller($controller) { $controller = ($controller)? $controller : self::default_controller; $controllerfile = self::controller_path. ucfirst(strtolower($controller)). 'Controller'. '.php'; // check if controller file exists if (!file_exists($controllerfile)) { die("controller '$controller' could not be found."); else { require_once($controllerfile); $this->controller = $controller. 'Controller'; return $this; private function setaction($action) {...) private function setparams(array $params) {... $this->controller = vehiclecontroller $this->action = detail $this->params = Array array(1) { [0]=> string(1) "1"
41 CONTROLLER.PHP public function run() { // checking the parameter count, using Reflection ( $reflector = new ReflectionClass($this->controller); $method = $reflector->getmethod($this->action); $parameters = $method->getnumberofrequiredparameters(); if (($parameters) > count($this->params)) { die("action '$this->action' in class '$this->controller' expects $parameters mandatory parameter(s), you only provided ". count($this->params). "."); // create an instance of the controller as an object $controller = new $this->controller(); // call the method based on $this->action and the params call_user_func_array(array($controller, $this->action), $this->params); $reflector = Class [ class VehicleController ] $method = Method [ public method detail ] $parameters = 1
42 VEHICLECONTROLLER.PHP <?php class VehicleController { private $_vehiclemapper; private $_vehicle; public function construct () { require_once(application_path. 'model/vehiclemapper.php'); $this->_vehiclemapper = new VehicleMapper(); public function index() {... public function detail($id) { $this->_vehicle = $this->_vehiclemapper->get($id); require_once(application_path.'view/vehicle_detail.php'); public function add() {... Code Onveranderd
43 <?php require_once(system_path. 'model/db.php'); require_once(application_path. 'model/vehicle.php'); class VehicleMapper { private $_db; VEHICLEMAPPER.PHP public function construct() { $this->_db = Db::getInstance(); public function add($object) {... public function getall() {... public function get($id) { $id = (int)$id; $query = " SELECT * FROM vehicles WHERE id =?; "; return $this->_db->queryone($query, 'Vehicle', array($id));
44 DB.PHP <?php class Db { private static $instance = null; private $_db;... public function execute($sql, $arguments = array()) { if (!is_array($arguments)) { $arguments = array($arguments); try { $stmt = $this->_db->prepare($sql); $stmt->execute($arguments); $stmt->setfetchmode(pdo::fetch_assoc); catch(pdoexception $e) { error_log($e->getmessage()); return $stmt;
45 DB.PHP public function queryall($sql, $type, $arguments = array()) { $stmt = $this->execute($sql, $arguments); return $stmt->fetchall(pdo::fetch_class, $type); public function queryone($sql, $type, $arguments = array()) { $stmt = $this->execute($sql, $arguments); return $stmt->fetchobject($type);
46 <?php class Vehicle { private $color; private $brand; VEHICLE.PHP public function construct() { public function tostring() { return 'een voertuig met de kleur '. $this->getcolor(). ' en het merk '. $this->getbrand(); public function setcolor($color) { $this->color = $color; public function getcolor() { return $this->color; public function setbrand($brand) { $this->brand = $brand; public function getbrand() { return $this->brand;
47 VEHICLE_DETAIL.PHP <!DOCTYPE html> <html> <body> <table> <th>kleur</th> <th>merk</th> <tr> <td><?php echo $this->_vehicle->getcolor();?></td> <td><?php echo $this->_vehicle->getbrand();?></td> </tr> </table> </body> </html> Code Onveranderd
48 FRONT CONTROLLER ZONDER $_GET Uitbreiding Categorie toevoegen
49 FRONT CONTROLLER ZONDER $_GET Problemen? veel dubbele code nu
50 FRONT CONTROLLER ZONDER $_GET Refactoren dubbele code Mapper klasse Identifiable klasse Zie dynweb2013examples/theorie07/ frontcontroller_stap04
51 MAPPER.PHP <?php require_once(system_path. 'model/db.php'); class Mapper {... protected $_db; protected $_table; protected $_type; public function construct($table, $type) { $this->_db = Db::getInstance(); $this->_table = $table; $this->_type = $type;
52 MAPPER.PHP public function get($id) { $query = " SELECT * FROM $this->_table WHERE id =? "; return $this->_db->queryone($query, $this->_type, array($id)); public function getall() { $query = " SELECT * FROM $this->_table "; return $this->_db->queryall($query, $this->_type);...
53 VEHICLEMAPPER.PHP <?php require_once(application_path. 'model/vehicle.php'); require_once(system_path. 'model/mapper.php'); class VehicleMapper extends Mapper { public function construct() { parent:: construct('vehicles', 'Vehicle');
54 IDENTIFIABLE.PHP <?php class Identifiable { private $_id; public function getid() { return $this->_id; public function setid($id) { $this->_id = $id; function get($property) { $method = "get{$property"; if (method_exists($this, $method)) { return $this->$method(); public function set($property, $value){ $method = "set{$property"; if (method_exists($this, $method)) { $this->$method($value);
55 <?php require_once(system_path. 'model/identifiable.php'); class Vehicle extends Identifiable { private $_color; private $_brand; public function construct() { public function setcolor($color) { $this->_color = $color; public function getcolor() { return $this->_color; public function setbrand($brand) { $this->_brand = $brand; public function getbrand() { return $this->_brand; VEHICLE.PHP
56 VEHICLE.PHP public function tostring() { return 'een voertuig met de kleur '. $this->getcolor(). ' en het merk '. $this->getbrand(); public function toarray() { $fields['color'] = $this->_color; $fields['brand'] = $this->_brand; return $fields;
57 AGENDA Lesschema Herhaling Front Controller?
58 VOORBEREIDING LABO Bekijk de code in svn dynweb2013examples/theorie07/frontcontroller
59 VOORBEREIDING LABO URLs home home/display/elke vehicle vehicle/detail/1 category category/detail/2
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