ID: 38287
Updated by: [EMAIL PROTECTED]
Reported By: steemann at globalpark dot de
-Status: Assigned
+Status: Closed
Bug Type: Class/Object related
Operating System: Linux 2.6.12-10-686
PHP Version: 5.2.0RC1
Assigned To: dmitry
New Comment:
Fixed in CVS HEAD and PHP_5_2.
Previous Comments:
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[2006-08-01 19:12:51] [EMAIL PROTECTED]
Dmitry, could you please take a look at it?
There are also several leaks, which seem to be related to the issue.
------------------------------------------------------------------------
[2006-08-01 18:57:16] steemann at globalpark dot de
Description:
------------
Variables in the global scope seem to keep corrupted when using static
properties/variables.
The script below has a global variable $not_there which is supposed to
be NULL
as it is not set. It is NULL when var_dumping it.
Although the variable is not set by the script, the variable value
changes during
execution so the script evaluates
if ($not_there["invalid_var"]))
to true obviously. When printing a hash of the variable
("use_authmodule" which
does not exist), the variable seems to be an array but it should be
NULL.
btw: magic_quotes_gpc is turned on.
Reproduce code:
---------------
something::do_something((int) $argv[1]);
// $not_there is really NULL
var_dump($not_there);
// error occurs here: execution should never get inside the if
condition because $not_there is NULL
if ($not_there["invalid_var"])
{
// will print NULL (which is ok, but execution should never get here
if the value is NULL)
var_dump($not_there["use_authmodule"]);
// will print "PATH:Array"
print "PATH:".$not_there["use_authmodule"];
}
class something
{
protected static $static_var=array();
public static function get_object()
{
static $object=NULL;
if ($object===NULL)
$object=new something;
return $object;
}
public static function do_something($version=0)
{
if ($version==0)
{
// $argv[1]==0: this will cause the error
foreach (array("g"=>&$_GET,"p"=>&$_POST,"r"=>&$_REQUEST) as
$var_name=>$super_global)
self::get_object()->static_var[]=$var_name;
} // end of version 0
if ($version==1)
{
// $argv[1]==1: this does the same but will not cause the error
$obj=self::get_object();
foreach (array("g"=>&$_GET,"p"=>&$_POST,"r"=>&$_REQUEST) as
$var_name=>$super_global)
$obj->static_var[]=$var_name;
} // end of version 1
} // end of do_something method
} // end of class something
Expected result:
----------------
expected result for $argv[1]==0:
NULL
result for $argv[1]==1:
NULL
Actual result:
--------------
Call the script above on the command line with $argv[1]=0.
Script execution gets into the "if ($not_there...)" part as the global
variable
$not_there gets corrupted.
result is:
NULL
NULL
PATH:Array
result for $argv[1]=1:
NULL
So the problem does not occur if the script is called with $argv[1] =
1.
The $argv interpretation and actual difference in the code is in method
do_something() of class "something".
I know the static property $static_var of class "something" should not
be
accessed via -> because it is static, but the code worked fine in PHP
5.1
and also works fine when using version 1 ($argv[1]=1).
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--
Edit this bug report at http://bugs.php.net/?id=38287&edit=1
