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Editor to share with you the use of php abstract class points and points for attention example analysis, I believe that most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's go to know it!

The specific analysis is as follows:

The main points and considerations for using php abstract classes are as follows:

1. Use abstract to modify a class, then the class is an abstract class; an abstract class can never be instantiated, that is, $abc = new abstract class name (); will report an error.

2. Use abstract to modify a method, then the method is an abstract method

3. If there is an abstract method in a class, then the class must be defined as an abstract class; but conversely, there is not necessarily an abstract method in the abstract class. In addition, there can be common methods in abstract classes.

4. Abstract methods cannot have method bodies. That is, abstract function abc ();-cannot be followed by parentheses {.}.

5. If a class inherits an abstract class, it must implement all the abstract methods in the abstract class (unless it also declares these abstract methods as abstract, which means that the abstract class inherits the abstract class).

Simple examples of abstract classes:

The above is all the contents of the article "sample Analysis of key points and considerations for the use of php Abstract classes". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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