通過下面代碼的輸出結果,我們可以很清楚地看出二者的區別:
<?php
//父類
class ParentClass
{
public function printClassName()
{
echo get_class($this) . " ";
echo __CLASS__ . " ";
}
}
//子類
class SonClass extends ParentClass
{
public function printMyClassName()
{
echo get_class($this) . " ";
echo __CLASS__ . " ";
}
}
function main()
{
$p = new ParentClass();
/*
打印結果:
ParentClass
ParentClass
*/
$p->printClassName();
$s = new SonClass();
/*
打印結果:
SonClass
ParentClass
*/
$s->printClassName();
/*
打印結果:
SonClass
SonClass
*/
$s->printMyClassName();
}
main();
?>
//父類
class ParentClass
{
public function printClassName()
{
echo get_class($this) . " ";
echo __CLASS__ . " ";
}
}
//子類
class SonClass extends ParentClass
{
public function printMyClassName()
{
echo get_class($this) . " ";
echo __CLASS__ . " ";
}
}
function main()
{
$p = new ParentClass();
/*
打印結果:
ParentClass
ParentClass
*/
$p->printClassName();
$s = new SonClass();
/*
打印結果:
SonClass
ParentClass
*/
$s->printClassName();
/*
打印結果:
SonClass
SonClass
*/
$s->printMyClassName();
}
main();
?>