Certainly! Object-Oriented Programming (OOP) in PHP is a programming paradigm based on the concept of "objects", which can contain data and code: data in the form of fields (often known as attributes or properties), and code, in the form of procedures (often known as methods).
Here's a brief breakdown of the core concepts of OOP in PHP:
Classes and Objects:
class Car {
public $color;
public function describe() {
return "This car is " . $this->color;
}
}
$redCar = new Car();
$redCar->color = "red";
echo $redCar->describe(); // Outputs: This car is red
Properties and Methods:
class Person {
public $name;
public $age;
public function greet() {
return "Hello, my name is " . $this->name . " and I'm " . $this->age . " years old.";
}
}
Constructor:
class Book {
public $title;
public $author;
public function __construct($title, $author) {
$this->title = $title;
$this->author = $author;
}
public function describe() {
return "This book, {$this->title}, was written by {$this->author}.";
}
}
$book = new Book("1984", "George Orwell");
echo $book->describe();
Inheritance:
class Vehicle {
public $wheels;
public function describe() {
return "This vehicle has " . $this->wheels . " wheels.";
}
}
class Bicycle extends Vehicle {
public function __construct() {
$this->wheels = 2;
}
}
$bike = new Bicycle();
echo $bike->describe(); // Outputs: This vehicle has 2 wheels.
Visibility (Public, Private, Protected):
Static Properties and Methods:
class Counter {
public static $count = 0;
public function __construct() {
self::$count++;
}
public static function showCount() {
return "Total objects created: " . self::$count;
}
}
$a = new Counter();
$b = new Counter();
echo Counter::showCount(); // Outputs: Total objects created: 2
Interfaces and Abstract Classes:
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