get_parent_class
(PHP 4, PHP 5, PHP 7)
get_parent_class — 返回对象或类的父类名
说明
如果 obj
是对象，则返回对象实例 obj
所属类的父类名。
如果 obj
是字符串，则返回以此字符串为名的类的父类名。此功能是在
PHP 4.0.5 中增加的。
Note:
自 PHP 5 起，如果在对象的方法内调用，则
obj为可选项。
Example #1 使用 get_parent_class()
<?php
class dad {
function dad()
{
// implements some logic
}
}
class child extends dad {
function child()
{
echo "I'm " , get_parent_class($this) , "'s son\n";
}
}
class child2 extends dad {
function child2()
{
echo "I'm " , get_parent_class('child2') , "'s son too\n";
}
}
$foo = new child();
$bar = new child2();
?>
以上例程会输出：
I'm dad's son I'm dad's son too
参见 get_class() 和 is_subclass_of()。
参数
-
object -
The tested object or class name
返回值
Returns the name of the parent class of the class of which
object is an instance or the name.
Note:
If the object does not have a parent or the class given does not exist
FALSEwill be returned.
If called without parameter outside object, this function returns FALSE.
更新日志
| 版本 | 说明 |
|---|---|
| Before 5.1.0 |
If called without parameter outside object, this function would have
returned NULL with a warning.
|
| Since 5.0.0 |
The object parameter is optional if called
from the object's method.
|
| Since 4.0.5 |
If object is a string, returns the name of the
parent class of the class with that name.
|
范例
Example #2 Using get_parent_class()
<?php
class dad {
function dad()
{
// implements some logic
}
}
class child extends dad {
function child()
{
echo "I'm " , get_parent_class($this) , "'s son\n";
}
}
class child2 extends dad {
function child2()
{
echo "I'm " , get_parent_class('child2') , "'s son too\n";
}
}
$foo = new child();
$bar = new child2();
?>
以上例程会输出：
I'm dad's son I'm dad's son too