PHP object-oriented (OOP) Day 2

: PHP object-oriented (OOP) Day 2: 1. differences between classes and objects: 2. modifier: 3. inheritance: 4. concept of overload: 5. concept of rewriting: 6. abstract: 7. interface: 1. differences between classes and objects:

2. modifier:

3. Inheritance:

4. concept of Heavy load:

5. concept of rewriting:

6. abstraction:

7. interface:

The next day of PHP object-oriented (OOP) is introduced above, which includes some content. I hope my friends who are interested in PHP tutorials will be helpful.