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Object-Oriented PHP

bookDefining Classes and Creating Objects

The Idea: Creating Blueprints for Objects

Before you write any code, you should understand what you are trying to achieve. In object-oriented programming, you use classes as blueprints to create objects. For example, if you want to represent cars in your code, you can define a class called Car.

Below, you define a simple Car class and then create an object from it.

CarExample.php

CarExample.php

copy

              
1234567891011

            
<?php
// Define a simple Car class
class Car {
}

// Create an object of the Car class
$myCar = new Car();

// Output the object to show it exists
var_dump($myCar);

The class Car {} line defines a new class named Car. The line $myCar = new Car(); creates an object (an instance) of the Car class and assigns it to the variable $myCar. This is the basic way to define a class and create an object in PHP.

question mark

Which of the following statements about classes and objects in PHP are correct?

Select the correct answer

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Kysy mitä tahansa tai kokeile jotakin ehdotetuista kysymyksistä aloittaaksesi keskustelumme

Suggested prompts:

Can you explain what properties or methods I can add to the Car class?

What is the difference between a class and an object?

Can you show how to use the $myCar object after creating it?

bookDefining Classes and Creating Objects

Pyyhkäise näyttääksesi valikon

The Idea: Creating Blueprints for Objects

Before you write any code, you should understand what you are trying to achieve. In object-oriented programming, you use classes as blueprints to create objects. For example, if you want to represent cars in your code, you can define a class called Car.

Below, you define a simple Car class and then create an object from it.

CarExample.php

CarExample.php

copy

              
1234567891011

            
<?php
// Define a simple Car class
class Car {
}

// Create an object of the Car class
$myCar = new Car();

// Output the object to show it exists
var_dump($myCar);

The class Car {} line defines a new class named Car. The line $myCar = new Car(); creates an object (an instance) of the Car class and assigns it to the variable $myCar. This is the basic way to define a class and create an object in PHP.

question mark

Which of the following statements about classes and objects in PHP are correct?

Select the correct answer

Oliko kaikki selvää?

Miten voimme parantaa sitä?

Kiitos palautteestasi!

Osio 1. Luku 2
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