PHP polymorphic Simple Example

<?PHP//Polymorphism is performed by different people to produce different results://A person performs the same action in different States, producing different results can also be called polymorphism//polymorphic principle, that is, the class is written well, do not modify it, as long as the call parameters outside the class Change//Excuse specification of the subclass of the action 
        Interfacecomputer{ Public functionVersion ();//This method indicates what method to use         Public functionWork ();//how it works.    }    //implement an excuse, a notebook Class A desktop class    classNotecomputerImplementscomputer{ Public functionversion () {EchoLaptop; }         Public functionWork () {Echo' Run Win7 '; }    }    classDesktopcomputerImplementscomputer{ Public functionversion () {EchoDesktop; }         Public functionWork () {Echo' Run XP '; }    }    //Create a user to use your computer    classperson{//Create a method to accept the computer         Public function_run ($type){            Echo' The person's '; $type-version (); $type-Work (); }    }    $note=NewNotecomputer (); $desktop=NewDesktopcomputer (); $person=NewPerson (); $person->_run ($note);//object references are passed, holding each other's references    Echo' <br/> '; $person->_run ($desktop);?>

PHP polymorphic Simple Example