Web Reference: Class Abstraction ¶ PHP has abstract classes, methods, and properties. Classes defined as abstract cannot be instantiated, and any class that contains at least one abstract method or property must also be abstract. The purpose of an abstract class is to enforce all derived classes (child classes) to implement the abstract method (s) declared in the parent class. An abstract class or method is defined with the abstract keyword. Mar 15, 2025 · Abstract classes in PHP are classes that may contain at least one abstract method. Unlike C++, abstract classes in PHP are declared using the abstract keyword. The purpose of abstract classes is to enforce that all derived classes implement the abstract methods declared in the parent class.
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