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PHP : Function Reference : Class/Object Functions : get_parent_class

get_parent_class

Retrieves the parent class name for object or class (PHP 4, PHP 5)
string get_parent_class ( [mixed object] )

Retrieves the parent class name for object or class.

Parameters

object

The tested object or class name

Return Values

Returns the name of the parent class of the class of which object is an instance or the name.

If called without parameter outside object, this function returns FALSE.

ChangeLog

Version Description
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.

Examples

Example 381. Using get_parent_class()

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<?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();

?>

The above example will output:

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I'm dad's son
I'm dad's son too


See Also
get_class()
is_subclass_of()

Related Examples ( Source code ) » get_parent_class

Examples ( Source code ) » get_parent_class

Code Examples / Notes » get_parent_class

eric dot brison
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
)

birkholz
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
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
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
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.

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