#39721 [Opn]: __autoload and inheritance causes data corruption
| From: | dlanoire at neuf dot fr | Date: | Sun, 03 Dec 2006 17:04:26 +0000 |
| Subject: | #39721 [Opn]: __autoload and inheritance causes data corruption | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-105827@lists.php.net to get a copy of this message | ||
ID: 39721
User updated by: dlanoire at neuf dot fr
Reported By: dlanoire at neuf dot fr
Status: Open
Bug Type: Class/Object related
Operating System: Windows XP SP2
PHP Version: 5.2.0
New Comment:
Sorry, I made a mistake with the source code. The good one is :
test.php :
<?php
include_once "autoload.php";
//include_once "test2.php";
//include_once "test2_child.php";
$foo = new test2();
$child = new test2_child();
echo $foo->instance . "<br>";
echo $child->instance . "<br>";
?>
test2.php :
<?php
class test2 {
private static $instances = 0;
public $instance;
public function __construct() {
$this->instance = ++self::$instances;
}
} // class
?>
test2_child.php :
<?php
include_once "autoload.php";
class test2_child extends test2 {
} // class
?>
autoload.php :
<?php
function __autoload($className) {
require_once $className . ".php";
}
?>
Previous Comments:
------------------------------------------------------------------------
[2006-12-03 16:52:12] dlanoire at neuf dot fr
Description:
------------
__autoload() function causes data corruption when using inheritance. In
my example, the value of $foo->instance is 2 and SHOULD BE 1 !
In test.php, if I comment the include_once of autoload.php and
uncomment the include_file of classes, the value of $foo->instance is
correct (=1).
Why ? Normally, there is no difference between autoload and explicit
class file inclusion ?
Reproduce code:
---------------
To test the bug, you need four files.
test.php :
<?php
include_once "autoload.php";
//include_once "test2.php";
//include_once "test2_child.php";
$foo = new test_oop();
$child = new test_oop_child();
echo $foo->instance . "<br>";
echo $child->instance . "<br>";
?>
test2.php :
<?php
class test_oop {
private static $instances = 0;
public $instance;
public function __construct() {
$this->instance = ++self::$instances;
}
} // class
?>
test2_child.php :
<?php
include_once "autoload.php";
class test_oop_child extends test_oop {
} // class
?>
autoload.php :
<?php
function __autoload($className) {
require_once $className . ".php";
}
?>
Expected result:
----------------
$foo->instance = 1
Actual result:
--------------
$foo->instance = 2
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=39721&edit=1