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
