get_object_vars
"'If called without parameter outside object' What on earth does that mean?"
There are two places this could be called:
1. From within a member function of an object. In this case, it may be called with no parameters and will return the parent class of the object owning the member function. (If the parameter is included, then it will return the parent class of the specified class as normal.)
2. From outside an object (i.e., global or function scope). In this case, PHP doesn't know what class you're talking about if you don't include a parameter, so it returns FALSE. (But, of course, it works if you specify the class with the parameter.)
get_parent_class
(PHP 4, PHP 5)
get_parent_class — 객체나 클래스의 부모 클래스명을 가져온다
설명
string get_parent_class
( mixed $obj
)
obj 가 객체이면, obj 를 초기화시킨 클래스의 부모 클래스명을 반환한다.
obj 가 문자열이면, 그 이름을 갖는 클래스의 부모 클래스명을 반환한다. 이 기능은 PHP 4.0.5에서 추가되었다.
Example#1 get_parent_class() 사용예
<?php
class dad {
function dad() {
// implements some logic
}
}
class child extends dad {
function child() {
echo "I'm " , get_parent_class($this) , "'s son\n";
}
}
class child2 extends dad {
function child2() {
echo "I'm " , get_parent_class('child2') , "'s son too\n";
}
}
$foo = new child();
$bar = new child2();
?>
출력은 다음과 같다:
I'm dad's son I'm dad's son too
add a note
User Contributed Notesget_parent_class
ssb45 at cornell dot edu
14-May-2008 08:32
14-May-2008 08:32
marcus at synchromedia dot co dot uk
16-Apr-2008 09:08
16-Apr-2008 09:08
"If called without parameter outside object" What on earth does that mean?
What I can tell you, and that is not documented, is that if the object in question does not have an explicitly declared parent class, it does return boolean false. It doesn't for example return 'stdClass' on the basis that all objects are derived from that.
birkholz at web dot de
06-Oct-2005 05:01
06-Oct-2005 05:01
tim at correctclick dot com wrote:
<quote>
A slightly more cryptic but faster get_ancestors function:
<?php
function get_ancestors ($class) {
for ($classes[] = $class; $class = get_parent_class ($class); $classes[] = $class);
return $classes;
}
?>
(The second part of the for is implicitly testing for $class != ""). Recursion is considerably slower than looping, so you probably want to use this function.
Hope someone finds it useful.
</quote>
I would prefer this version, because it will create no duplicates:
<?php
function get_ancestors ($class) {
$classes = array($class);
while($class = get_parent_class($class)) { $classes[] = $class; }
return $classes;
}
Greets, Dennis
?>
matt-php at DONT-SPAM-ME dot bitdifferent dot com
01-Nov-2004 07:52
01-Nov-2004 07:52
PHP (4 at least, dunno about 5) stores classnames in lower case, so:
<?PHP
class Foo
{
}
class Bar extends Foo
{
}
echo get_parent_class('Bar');
echo "\n";
echo get_parent_class('bar');
?>
will output:
foo
foo
radu dot rendec at ines dot ro
07-Apr-2004 06:44
07-Apr-2004 06:44
If the argument obj is a string and the class is not defined, then the function returns FALSE.
If the argument obj is an object created from a class with no ancestors (or a string representing a class with no ancestors), then the function returns FALSE.
tim at correctclick dot com
05-Apr-2003 07:48
05-Apr-2003 07:48
A slightly more cryptic but faster get_ancestors function:
function get_ancestors ($class) {
for ($classes[] = $class; $class = get_parent_class ($class); $classes[] = $class);
return $classes;
}
(The second part of the for is implicitly testing for $class != ""). Recursion is considerably slower than looping, so you probably want to use this function.
Hope someone finds it useful.
eric dot brison at anakeen dot com
28-Jan-2002 04:14
28-Jan-2002 04:14
To return all ancestors class of an object
function get_ancestors_class($classname) {
$father = get_parent_class($classname);
if ($father != "") {
$ancestors = get_ancestors_class($father);
$ancestors[] = $father;
}
return $ancestors;
}
example :
-----------
Class C {
}
Class B extends C {
}
Class A extends B {
}
print_r (get_ancestors_class("a"));
print_r (get_ancestors_class("b"));
example result :
---------------
Array
(
[0] => c
[1] => b
)
Array
(
[0] => c
)