What is an object
All things in the world are objects (can be visible or some abstract concepts, etc.)
The basic composition of the object
1. The constituent elements of an object (attributes)
2. Object behavior (method)
Features of the object:
1, each of the objects are unique
2, the object is a specific thing, his function is to complete a specific function,
3. Objects can be reused
Why object-oriented
1, the object description way more close to the real world, is advantageous to the large-scale business understanding
The essence of object-oriented
1, object-oriented is to solve problems in life to be stored in the way of objects (properties, methods)
2. Interaction between object and object through method invocation
The basic idea of object-oriented
First step: Identify objects
Step two: Identify the properties of an object
Step three: Identify the behavior of an object
Object-oriented Basic principles
1, the object inside is high cohesion
2, the object is low-coupling external
Basic object-oriented learning in PHP
