Wstęp do programowania w języku PHP

Transcription

1 Wstęp do programowania w języku PHP

2 Programowanie obiektowe PHP OOP

3 O czym jest ta prezentacja wstęp do programowania obiektowego cechy języka php przestrzenie nazw composer automatyczne ładowanie klas

4 Programowanie obiektowe klasa enkapsulacja metody magiczne dziedziczenie klasy abstrakcyjne interfejsy cechy przestrzenie nazw

5 Klasa /** * Class representing any electronic Device John Doe <[email protected]> */ class Device { /** * Outer case color string */ public $color = 'white'; /** * Returns device's unique s/n string */ public function getserial() { return '1M8GDM9AKP042788'; /** * Performs soft restart on a device */ public function restart() {

6 Klasa class Device { public $color = 'white'; public function getserial () { return '1M8GDM9AKP042788' ; public function restart () { $mydevice = new Device(); $mydevice ->color = 'black';

7 Enkapsulacja class Device { private $color = 'white'; public function getserial () { return '1M8GDM9AKP042788' ; $mydevice = new Device(); $mydevice ->color = 'black'; Fatal error: Cannot access private property Device::$color

8 Enkapsulacja class Device { private $color = 'white'; Modyfikatory dostępu private protected public public function getserial () { return '1M8GDM9AKP042788' ; $mydevice = new Device(); $mydevice ->color = 'black'; Fatal error: Cannot access private property Device::$color

9 Konstruktor class Phone { private $imei; public function construct ($imei) { $this->imei = $imei;

10 Konstruktor class Phone { private $imei; public function construct ($imei) { $this->imei = $imei;

11 Konstruktor class Phone { private $imei; public function construct ($imei) { $this->imei = $imei; $foo = new Phone();

12 Konstruktor class Phone { private $imei; public function construct ($imei) { $this->imei = $imei; $foo = new Phone(); Warning:Missing argument 1 for Phone:: construct ()

13 Konstruktor class Phone { private $imei; public function construct ($imei) { $this->imei = $imei; $foo = new Phone(' ' );

14 Metody Magiczne class Phone { private $attributes = array(); public function construct (array $attributes ) { $this->attributes = $attributes ;

15 Metody Magiczne class Phone { private $attributes = array(); public function construct (array $attributes ) { $this->attributes = $attributes ; public function get($name) { if(array_key_exists ($name, $this->attributes )) { return $this->attributes [$name]; return null;

16 Metody Magiczne class Phone { //... public function get($name) { if(array_key_exists ($name, $this->attributes )) { return $this->attributes [$name]; return null; $phone = new Phone([ 'color' => 'black', 'mpix' => 8 ]); echo $phone->mpix;

17 Metody Magiczne class Phone { //... public function set($name, $value ) { $this->attributes[$name] = $value; $phone = new Phone([ 'color' => 'black', 'mpix' => 8 ]);

18 Metody Magiczne class Phone { //... public function set($name, $value ) { $this->attributes[$name] = $value; $phone = new Phone([ 'color' => 'black', 'mpix' => 8 ]); $phone->mpix = 16; echo $phone->mpix;

19 Dziedziczenie class Phone extends Device { public function call($number) { // (...) $myphone = new Phone();

20 Dziedziczenie class Phone extends Device { public function call($number) { // (...) $myphone = new Phone(); $myphone ->color = 'blue';

21 Dziedziczenie class Phone extends Device { public function call($number) { // (...) $myphone = new Phone(); $myphone ->color = 'blue'; $serial = $myphone ->getserial ();

22 Dziedziczenie class Phone extends Device { public function call($number) { // (...) $myphone = new Phone(); $myphone ->color = 'blue'; $serial = $myphone ->getserial (); $myphone ->call(' ' );

23 Klasa abstrakcyjna abstract class PhoneAbstract { public $color = 'white'; public abstract function call($number); ; $somephone = new PhoneAbstract ();

24 Klasa abstrakcyjna abstract class PhoneAbstract { public $color = 'white'; public abstract function call($number); ; $somephone = new PhoneAbstract (); Fatal error: Cannot instantiate abstract class Phone

25 Klasa abstrakcyjna class IPhone extends PhoneAbstract { ; $iphone = new IPhone();

26 Klasa abstrakcyjna class IPhone extends PhoneAbstract { ; $iphone = new IPhone(); Fatal error: Class IPhone contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Phone::call)

27 Klasa abstrakcyjna class IPhone extends PhoneAbstract { public function call($number){ //... ;

28 Klasa abstrakcyjna vs interfejs abstract class Camera { public abstract function record(); class IPhone extends Phone, Camera {

29 Klasa abstrakcyjna vs interfejs abstract class Camera { public abstract function record(); class IPhone extends Phone, Camera {

30 Klasa abstrakcyjna vs interfejs abstract class Camera{ public abstract function record(); class IPhone extends Phone, Camera { Brak wielokrotnego dziedziczenia w języku PHP

31 Interface common/phoneinterface.php interface PhoneInterface { public function call($number); common/camerainterface.php interface CameraInterface { public function record();

32 Interface common/phoneinterface.php interface PhoneInterface { public function call($number); common/camerainterface.php interface CameraInterface { public function record(); class IPhone implements PhoneInterface, CameraInterface { public function call($number) { /*... */ public function record() { /*... */

33 Interface common/phoneinterface.php interface PhoneInterface { public function call($number); Tylko metody publiczne common/camerainterface.php interface CameraInterface { public function record(); class IPhone implements PhoneInterface, CameraInterface { public function call($number) { /*... */ public function record() { /*... */

34 Cechy trait PhoneBehavior { public function call($number) { /*... */

35 Cechy trait PhoneBehavior { public function call($number) { /*... */ trait CameraBehavior { public function record() { /*... */

36 Cechy trait PhoneBehavior { public function call($number) { /*... */ trait CameraBehavior { public function record() { /*... */ class IPhone { use PhoneBehavior, CameraBehavior ; $iphone = new IPhone(); $iphone->record();

37 Przestrzenie nazw smartphone/camerainterface.php /** * This is a smartphone camera interface, every smartphone with digital camera must implement * this interface. */ interface CameraInterface { sony/dvr/camerainterface.php /** * This is SONY digital camera interface, every sony DVR must implement this interface. */ interface CameraInterface {

38 Przestrzenie nazw smartphone/camerainterface.php /** * This is a smartphone camera interface, every smartphone with digital camera must implement * this interface. */ interface CameraInterface { sony/dvr/camerainterface.php /** * This is SONY digital camera interface, every sony DVR must implement this interface. */ interface CameraInterface { class IPhone implements PhoneInterface, CameraInterface { public function call($number) { /*... */ public function record() { /*... */

39 Przestrzenie nazw smartphone/camerainterface.php Kolizja nazw, parser PHP nie wie, który interfejs implementuje nasz IPhone /** * This is a smartphone camera interface, every smartphone with digital camera must implement * this interface. */ interface CameraInterface { sony/dvr/camerainterface.php /** * This is SONY digital camera interface, every sony DVR must implement this interface. */ interface CameraInterface { class IPhone implements PhoneInterface, CameraInterface { public function call($number) { /*... */ public function record() { /*... */

40 Przestrzenie nazw src/apple/camerainterface.php namespace Apple; interface CameraInterface { public function record(); public function takephoto ();

41 Przestrzenie nazw src/apple/camerainterface.php namespace Apple; interface CameraInterface { public function record(); public function takephoto (); src/apple/iphone.php namespace Apple; class Iphone implements CameraInterface {

42 Przestrzenie nazw namespace MyApplication ; use Apple; $phone = new Apple\IPhone ();

43

44 Zarządzanie zależnościami composer

45 Zarządzanie zależnościami co to są zależności composer.json packagist automatyczne ładowanie klas

46 Zależności i zależności zależności

47 composer.json { "require": { "symfony/translation": "*"

48

49

50 Automatyczne ładowanie klas require 'vendor/autoload.php' ; use Symfony\Component\Translation\Translator ; use Symfony\Component\Translation\MessageSelector ; use Symfony\Component\Translation\Loader\ArrayLoader ; $translator = new Translator ('fr_fr', new MessageSelector ()); $translator ->setfallbacklocales (array('fr')); $translator ->addloader ('array', new ArrayLoader ()); $translator ->addresource ('array', array( 'Hello World!' => 'Bonjour', ), 'fr'); echo $translator ->trans('hello World!' )."\n";

51 composer.json { "require": { "symfony/translation": "*", "autoload": { "psr-4": {"RSTDevSchool\\": "src/"

52 Automatyczne ładowanie klas namespace RSTDevSchool ; use Symfony\Component\Translation\Translator ; use Symfony\Component\Translation\MessageSelector ; use Symfony\Component\Translation\Loader\ArrayLoader ; class Renderer { public function render($view) { /* */ $this->renderinternal ($view, $this->translator );

53 Automatyczne ładowanie klas require 'vendor/autoload.php' ; use \RstDevSchool\Renderer ;

54 Automatyczne ładowanie klas require 'vendor/autoload.php' ; use \RstDevSchool\Renderer ; use \RSTDevSchool as Rst;

55 Automatyczne ładowanie klas require 'vendor/autoload.php' ; use \RstDevSchool\Renderer ; use \RSTDevSchool as Rst; $renderer = new Rst/Renderer (); $renderer ->render('myview' );

56 Automatyczne ładowanie klas require 'vendor/autoload.php' ; use \RstDevSchool\Renderer ; use \RSTDevSchool as Rst; $renderer = new Rst/Renderer (); $renderer ->render('myview' ); $renderer = new Renderer (); $renderer ->render('myotherview' );

57 slim framework { "require": { "slim/slim": "2.*"

58 slim framework require 'vendor/autoload.php' ; $app = new \Slim\Slim (); $app->get('/hello/:name', function ($name) { echo "Hello, $name"; ); $app->run();

59 Dziekuje ;)