子类中编写跟父类完全一致的方法名 可以完成 对父类方法的重写
*
添加final关键字能让这个方法不能被子类重写 但是可以调用 final public function();
*
对不不想被任何类继承的类 可以在类前面 添加 final, final class Class();
//禁止重载方法
*/
final class BaseClass
{
//添加final关键字能让这个方法不能被子类重写
public final function test()
{
echo "BasicClass::test1";
}
public function test1()
{
echo "BasicClass::test1";
}
}
class ChildClass extends BaseClass
{
public function test($tmp = null)
{
echo "childClass::sss";
}
}
$obj1 = new ChildClass();
$obj1->test('tmp');
class BaseClass
{
public function test()
{
echo "BasicClass::test1";
}
public function test1()
{
echo "BasicClass::test1";
}
}
class ChildClass extends BaseClass
{
const CONST_VALUE = "a const value";
private static $sValue1 = "static value <br/>";
public function test($tmp = null)
{
echo "childClass::sss";
parent::test();
self::called();
echo self::CONST_VALUE;
echo static::$sValue1;
}
public function called()
{
echo "this is a function called<br/>";
}
}
$obj1 = new ChildClass();
$obj1->test();
<?php
class BaseClass
{
public function test()
{
echo "BaseClass::test() called<br>";
}
public final function moreTesting()
{
echo "BaseClass::moreTesting() called<br>";
}
}
class ChildClass extends BaseClass
{
public function test()
{
echo "ChildClass::test() called<br>";
}
}
$ins = new ChildClass();
echo $ins->test() . '<br >';
echo $ins->moreTesting();
