Basic code tutorial on php inheritance usage

This article mainly introduces PHP object-orientedProgramming OOPInheritance usage, and analyzes the definition of php classes and inheritance usage methods in the form of simple examples. Friends in need can refer to Next

The examples in this article describe the usage of OOP inheritance in PHP object-oriented programming. Share it with everyone for your reference, the details are as follows:

<?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();
?>

Result:

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

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