PHP面向对象程序设计OOP继承用法入门示例

本文实例讲述了PHP面向对象程序设计OOP继承用法。分享给大家供大家参考，具体如下：<&#

本文实例讲述了PHP面向对象程序设计OOP继承用法。分享给大家供大家参考，具体如下：

<?php
class Person {
 var $name;//protected
 var $sex;
 var $age;
 function __construct($name = "", $sex = "男", $age = 22) {
 $this->name = $name;
 $this->sex = $sex;
 $this->age = $age;
 }
 function say() {
 echo $this->name . "在说话<br/>";
 }
 function run() {
 echo "在走路·<br/>";
 }
}
class Student extends Person {
 var $school;
 function __construct($name = "", $sex = "男", $age = 22,$school="") {
 parent::__construct($name,$sex,$age);
 $this->school = $school;
 }
 function study() {
 echo $this->name."正在".$this->school."学习<br/>";
 }
}
class Teacher extends Student {
 var $wage;
 function teaching() {
 echo $this->name."正在".$this->school."教学，每月工资为".$this->wage."<br/>";
 }
}
$teacher1 = new Teacher("kaifu","男",22);
$teacher1->school = "edu";
$teacher1->wage = 4000;
$teacher1->say();
$teacher1->study();
$teacher1->teaching();
?>

结果：

kaifu在说话
kaifu正在edu学习
kaifu正在edu教学，每月工资为4000