The difference between method overloading and rewriting, the difference between method overloading and rewriting_PHP tutorial

The difference between method overloading and rewriting, the difference between method overloading and rewriting

Answer 1: Fundamental difference:
Rewriting (refactoring) is very intuitive. The subclass covers the method of the parent class with the same name, parameters and return value. Only the rewritten method is called by the subclass
Overloaded, just with the same name. ​ ​ Answer 2: 1. Overloading:
The method name is the same, but the parameter list is different
2. Rewriting:
is also called overwriting, which means defining a method in the subclass with the same name and parameter list as the method in the parent class method. Because the subclass will inherit the methods of the parent class, and rewriting means redefining the methods inherited from the parent class and refilling the code in the method. ​ ​
Answer three: ​ Answer four:
1. Overriding must be inherited, overloading is not used.
2. The overridden method names have the same number of parameters and compatible parameter types. The overloaded method names have the same name but different parameter lists.
3. The overridden method modifier is greater than or equal to the parent class method, and the overloading has nothing to do with the modifier.
4. Rewriting cannot throw general exceptions that are not thrown by the parent class, but can throw runtime exceptions