Object-oriented programming (OOP) is a programming paradigm that organizes code around objects, which are instances of classes. It provides a way to structure code, promote reusability, and model real-world entities. In PHP, OOP is implemented through classes, objects, and inheritance. Here's an in-depth explanation along with examples:
1. Classes:
* A class is a blueprint or template for creating objects. It defines the properties (attributes) and behaviors (methods) that objects of that class will have.
* In PHP, you can define a class using the `class` keyword followed by the class name.
* Example:
```
php`class Car {
public $brand;
public $color;
public function startEngine() {
echo "Engine started!";
}
}`
```
* In the above example, the `Car` class has two properties: `$brand` and `$....
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