In PHP, you can define an abstract class using the abstract keyword like abstract class ClassName { ______ }.
- public methods and properties
- abstract methods and properties
- private methods and properties
- static methods and properties
In PHP, to define an abstract class, you can indeed use the abstract keyword followed by the class keyword and the name of the class. For example: abstract class ClassName { }. Within the abstract class, you can define both abstract methods (without implementation) and non-abstract methods (with implementation). Abstract methods serve as placeholders that must be implemented in the child classes that inherit from the abstract class. To learn more, see: http://php.net/manual/en/language.oop5.abstract.php
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