PHP Abstract Class Usage example analysis, PHP abstract instance Analysis _php Tutorial

PHP Abstract Class Usage example analysis, PHP abstract instance Analysis

The examples in this article describe the PHP abstract class usage. Share to everyone for your reference. Specific as follows:

<?php/* * Abstract class: * 1, at least one abstract method (no concrete implementation method) * 2, cannot be instantiated, can be inherited * 3, abstract class can have sub-abstract class * Relative to the interface: * 1, can have attributes * 2, a subclass can inherit only one abstract class , but multiple interfaces can be implemented * * *  /abstract class Qian {  abstract function getfirst ();  function Gettwo () {    echo "I am Gettwo";}  } abstract class JJ extends Qian {  abstract function getthree ();} C Lass Nan extends JJ {  function GetFirst () {    echo "I am GetFirst";  }  function Getthree () {    echo "I am Getthree";  }} $nn = new Nan (); $nn->getfirst (); $nn->gettwo (); $nn->g Etthree ();? >

I hope this article is helpful to everyone's PHP programming.

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