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

更多关于PHP相关内容感兴趣的读者可查看本站专题：《php面向对象程序设计入门教程》、《PHP基本语法入门教程》、《PHP运算与运算符用法总结》、《PHP网络编程技巧总结》、《PHP数组(Array)操作技巧大全》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。