通过下面代码的输出结果,我们可以很清楚地看出二者的区别:
<?php
//父类
class ParentClass
{
public function printClassName()
{
echo get_class($this) . " ";
echo __CLASS__ . " ";
}
}
//子类
class SonClass extends ParentClass
{
public function printMyClassName()
{
echo get_class($this) . " ";
echo __CLASS__ . " ";
}
}
function main()
{
$p = new ParentClass();
/*
打印结果:
ParentClass
ParentClass
*/
$p->printClassName();
$s = new SonClass();
/*
打印结果:
SonClass
ParentClass
*/
$s->printClassName();
/*
打印结果:
SonClass
SonClass
*/
$s->printMyClassName();
}
main();
?>
//父类
class ParentClass
{
public function printClassName()
{
echo get_class($this) . " ";
echo __CLASS__ . " ";
}
}
//子类
class SonClass extends ParentClass
{
public function printMyClassName()
{
echo get_class($this) . " ";
echo __CLASS__ . " ";
}
}
function main()
{
$p = new ParentClass();
/*
打印结果:
ParentClass
ParentClass
*/
$p->printClassName();
$s = new SonClass();
/*
打印结果:
SonClass
ParentClass
*/
$s->printClassName();
/*
打印结果:
SonClass
SonClass
*/
$s->printMyClassName();
}
main();
?>