<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<?php
class Person
{
function __construct($name, $sex)
{
$this->name = $name;
$this->sex = $sex;
}
function showName()
{
echo $this->name;
}
function showSex()
{
echo $this->sex;
}
}
/**
* 子类
*/
class Teacher extends Person
{
function __construct($name, $sex, $job)
{
parent::__construct($name, $sex);
$this->job = $job;
}
function showJob()
{
echo $this->job;
}
}
//$p1 = new Person(‘刘一‘, ‘男‘);
$laowang = new Teacher(‘老王‘, ‘男‘, ‘老师‘);
// $p1->showSex();
// $laowang->showJob();
$laowang->showSex();
$laowang->showName();
?>
</body>
</html>
原文：http://www.cnblogs.com/zsongs/p/5304147.html