重载可以重写父类中指定方法所实现的功能
代码示例:
<?php
class father
{
//定义father 类
public function printNUM()
{
echo 10;
}
}
class child extends father
{
//子类child 继承 father 类
public function printNUM()
{
//重写 father 类中的方法，实现重载
echo 10 * 10;
}
}
$test1 = new father();
$test1->printNUM();
//输出10
echo "<br>";
$test2 = new child();
$test2->printNUM();
// 输出100
?>
运行结果:
10
100
public function __construct()
{
parent::__construct();
}
{
$this->name = $na;
$this->age = $ag;
$this->person = $perso;
}
public function act()
{
echo $this->person . " name is " . $this->name . "<br/>";
}
}
class father extends human
{
public function work()
{
echo $this->person . " go to office.<br/>";
}
}
class mother extends human
{
public function work()
{
echo $this->person . " cook fish.<br/>";
echo $this->person . " age is " . $this->age;
}
}
$father_obj = new father("Abdul", "45", "Father");
$father_obj->work();
$father_obj->act();
$mother_obj = new mother("Sufia", "38", "Mother");
$mother_obj->act();
$mother_obj->work();
