PHP Abstract Class Summary: in this tutorial, you will learn how to use the PHP abstract class to define an interface for other classes to extend. Introduction to the PHP abstract class An abstract class is a class that cannot be instantiated. Typically, an abstract defines an interface for other classes to extend. To define…
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PHP protected Summary: in this tutorial, you will learn how to use the PHP protected access modifier to allow child classes to access properties and methods of the parent class. Introduction to the PHP protected access modifier In the access modifier tutorial, you learned about the public and private access modifiers. The public properties and…
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PHP Override Method Summary: in this tutorial, you will learn about the PHP overriding method and how to apply it effectively in your script. Introduction to the PHP overriding method Method overriding allows a child class to provide a specific implementation of a method already provided by its parent class. To override a method, you…
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How to Call the Parent Constructor Summary: in this tutorial, you’ll learn how to call the parent constructor from the constructor of the child class. Child class doesn’t have a constructor In the inheritance tutorial, you have learned how to define the SavingAccount class that inherits the BankAccount class: However, we haven’t discussed the constructors…
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PHP Inheritance Summary: in this tutorial, you will learn about the PHP inheritance that allows a class to reuse the code from another class. Introduction to the PHP inheritance Inheritance allows a class to reuse the code from another class without duplicating it. In inheritance, you have a parent class with properties and methods, and…
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PHP Readonly Properties Summary: in this tutorial, you’ll learn about the PHP readonly properties that can be only initialized once. Introduction to the PHP readonly properties PHP 8.1 introduced the readonly class properties. The readonly properties allow you to define properties that can be only initialized once within the class. To define a readonly property,…
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PHP Typed Properties Summary: in this tutorial, you wil learn how to define typed properties by adding type hints to class properties. Introduction to the PHP typed properties The following example defines the BankAccount class with a property called $balance: class BankAccount { public $balance; } Code language: PHP (php) The default value of the…
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PHP Destructor Summary: in this tutorial, you will learn about the PHP destructor and use it to clean up the resources when the object is deleted. Introduction to the PHP destructor Like the constructor, PHP allows you to define a destructor for a class using a special method __destruct() like this: <?php class className {…
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PHP Constructor Summary: in this tutorial, you will learn how to use the PHP constructor to initialize the properties of an object. Introduction to the PHP Constructor PHP allows you to declare a constructor method for a class with the name __construct() as follows: <?php class ClassName { function __construct() { // implementation } }…
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PHP Access Modifiers Summary: in this tutorial, you will learn about PHP access modifiers, including public and private, and understand the differences between them. Introduction to PHP access modifiers In the objects and classes tutorial, you have learned about how to use the public access modifier with properties and methods. In fact, PHP has three…
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