'Advanced Guide to Object-Oriented Programming in PHP: Mastering Object-Oriented Programming Thoughts'

Object-orientedBasic knowledge of programming

1. Classes: Classes are the basic building blocks of object-oriented programming. It defines the properties and methods of the object.
2. Object: An object is an instance of a class. It has all the properties and methods of the class.
3. Methods: Methods are behaviors defined by a class. It can access the object's properties and operate on them.
4. Attributes: Attributes are the status of the class. It can store data and be accessed by the object's methods.

class ClassName {
// 类属性
public $property1;
private $property2;

// 类方法
public function method1() {
// 方法体
}

private function method2() {
// 方法体
}
}

$object = new ClassName();

$object->property;

$object->method();

1. Reusability: You can reuse classes and objects in multiple projects . This saves time and effort.
2. Maintainability: Object-oriented programming code is easier to maintain. This is because you can organize your code into logical units and make changes to those units easily.
3. Extensibility: Object-oriented programming code is easily extensible. This is because you can add new classes and objects without affecting existing code.

1. Complexity: Object-oriented programming code can be more complex than procedural code. This is because you need to consider the relationships between classes, objects, methods, and properties.
2. Performance: Object-oriented programming code may be slower than procedural code. This is because method calls on objects require more overhead.

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