Object-Oriented Development 5 abstract keywords abstract

Definition, which is equivalent to a specification. an abstract class cannot be instantiated. it can only be instantiated after being overloaded in a derived class. Abstract class: when at least one method in a class is an abstract method, it can be called an abstract class. abstract functions must be added before abstract methods and abstract classes. More importantly, they can be used as a standard and a ruler. If no abstract class is overloaded in the derived class, an error is returned.

Definition, which is equivalent to a specification. an abstract class cannot be instantiated. it can only be instantiated after being overloaded in a derived class.

Abstract class. an abstract class can be called only when at least one method in a class is an abstract method. abstract methods and abstract classes must be added before abstract methods.

It is used as a standard and a ruler. If no abstract class is overloaded in the derived class, an error is returned.

 
 

  
  
 Abstract class Cxclass {
  
  
Abstract function Name ();
  
  
Abstract function Stroe ();
  
  
Abstract function Sex ();
  
  
}
  
  
Class Myclass extends Cxclass {
  
  
Public $ name;
  
  
Public $ stroe;
  
  
Public $ sex;
  
  
Function _ construct ($ name, $ stroe, $ sex ){
  
  
$ This-> name = $ name;
  
  
$ This-> stroe = $ stroe;
  
  
$ This-> sex = $ sex;
  
  
}
  
  
Function Name (){
  
  
Return "name". $ this-> name ."
";
  
  
}
  
  
Function Stroe (){
  
  
Return "score". $ this-> stroe ."
";
  
  
}
  
  
Function Sex (){
  
  
Return "gender". $ this-> sex ."
";
  
  
}
  
  

  
  
}
  
  
$ Myclass = new Myclass ("small", 96, "male ");
  
  
Echo $ myclass-> Name (). $ myclass-> Stroe (). $ myclass-> Sex ();
  
  
?>
 
 

Output result

Small name
Score 96
Gender Male