PHPのオブジェクト指向プログラミング入門

オブジェクト指向プログラミングとは何ですか？

OOPを使用する理由

クラスとオブジェクト

<?php
  class Car {
    public $make;
    public $model;

    public function drive() {
      echo "The car is driving!";
    }
  }

  // Creating an object
  $myCar = new Car();
  $myCar->make = "Toyota";
  $myCar->model = "Corolla";

  echo "Make: " . $myCar->make . ", Model: " . $myCar->model;
  $myCar->drive();
?>

クラスのプロパティ

<?php
  class Person {
    public $name;
    public $age;
  }

  $person = new Person();
  $person->name = "Alice";
  $person->age = 25;

  echo "Name: " . $person->name . ", Age: " . $person->age;
?>

クラスのメソッド

<?php
  class Animal {
    public function speak() {
      echo "The animal makes a sound.";
    }
  }

  $animal = new Animal();
  $animal->speak();
?>

コンストラクター

<?php
  class Book {
    public $title;
    public $author;

    public function __construct($title, $author) {
      $this->title = $title;
      $this->author = $author;
    }

    public function getDetails() {
      return "Title: $this->title, Author: $this->author";
    }
  }

  $book = new Book("1984", "George Orwell");
  echo $book->getDetails();
?>

カプセル化

<?php
  class BankAccount {
    private $balance;

    public function __construct($initialBalance) {
      $this->balance = $initialBalance;
    }

    public function getBalance() {
      return $this->balance;
    }

    public function deposit($amount) {
      $this->balance += $amount;
    }
  }

  $account = new BankAccount(100);
  $account->deposit(50);
  echo "Balance: " . $account->getBalance();
?>

よくできました！