#29015 [Opn->Ver]: Incorrect behavior of member vars(non string ones)-numeric mem vars und others
| From: | andrey@php.net | Date: | Fri, 13 Aug 2004 22:48:03 +0000 |
| Subject: | #29015 [Opn->Ver]: Incorrect behavior of member vars(non string ones)-numeric mem vars und others | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-64583@lists.php.net to get a copy of this message | ||
ID: 29015
Updated by: andrey@php.net
-Summary: Strange behavior of field which names are not strings
Reported By: tomas_matousek at hotmail dot com
-Status: Open
+Status: Verified
Bug Type: Zend Engine 2 problem
-Operating System: WinXP
+Operating System: All
-PHP Version: 5.0.0RC3
+PHP Version: 5.0.0+
Previous Comments:
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[2004-08-14 00:43:06] php at hristov dot com
AFAUK, internally the private member variables are stored in such a way
that the first byte is \0, which maybe you emulate with your test case.
":private" means that the member var is private one.
shorter example for "creating" of a private variable :
php -r '$a=new stdclass();$a->$b=3;var_dump($a);'
and of "integer" member variable
php -r '$a=new stdclass();$b=3;$a->$b=3;var_dump($a);'
andrey
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[2004-07-05 15:02:12] tomas_matousek at hotmail dot com
Description:
------------
If I try to use variable with non-string name (e.g.
$x = 10; $$x = ...) the name is converted to a string using standard
conversion rules. That's ok.
But this doesn't work on object's field which is IMHO a bug and it
implies some a buggy behavior.
See the code bellow.
It seems that by:
$x = null;
$a->$x = "whatever";
one can somehow create a private variable (or something like that,
don't know what ":private" means)!
Moreover, there is possibly a bug in get_object_vars when a field name
is a numeric string (e.g. "10") (compare the first item of results of
get_object_vars and var_dump).
Reproduce code:
---------------
function field_names_test()
{
$a = new stdClass();
$x = 10;
$a->$x = "int(10)";
$x = "10";
$a->$x = "string('10')";
$x = "";
$a->$x = "string('')";
$x = null;
$a->$x = "null";
$x = 1.8;
$a->$x = "double(1.8)";
$x = false;
$a->$x = "bool(false)";
$x = array(1,2,3);
$a->$x = "array(1,2,3)";
var_dump(get_object_vars($a));
var_dump($a);
}
field_names_test();
Expected result:
----------------
array(4) {
["10"]=>
string(12) "string('10')"
[""]=>
string(11) "bool(false)"
["1.8"]=>
string(11) "double(1.8)"
["Array"]=>
string(12) "array(1,2,3)"
}
object(stdClass)#1 (4) {
["10"]=>
string(12) "string('10')"
[""]=>
string(11) "bool(false)"
["1.8"]=>
string(11) "double(1.8)"
["Array"]=>
string(12) "array(1,2,3)"
}
Actual result:
--------------
array(3) {
[10]=>
string(12) "string('10')"
["1.8"]=>
string(11) "double(1.8)"
["Array"]=>
string(12) "array(1,2,3)"
}
object(stdClass)#1 (4) {
["10"]=>
string(12) "string('10')"
[":private"]=>
string(11) "bool(false)"
["1.8"]=>
string(11) "double(1.8)"
["Array"]=>
string(12) "array(1,2,3)"
}
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=29015&edit=1