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Bug #45820 ArrayObject does not allow empty strings as keys
Submitted: 2008-08-14 12:13 UTC Modified: 2008-12-30 23:34 UTC
From: toby@php.net Assigned: colder
Status: Closed Package: SPL related
PHP Version: 5.2.6 OS: Gentoo
Private report: No CVE-ID:
 [2008-08-14 12:13 UTC] toby@php.net
Description:
------------
While '' works as an array key, it does not work with ArrayObject. It should either work both or none (first one preferred).

Reproduce code:
---------------
php > $foo = new ArrayObject();
php > $foo[''] = 'lala';
PHP Fatal error:  Uncaught exception 'InvalidArgumentException' with message 'An offset must not begin with \0 or be empty' in php shell code:1
Stack trace:
#0 php shell code(1): unknown()
#1 {main}
  thrown in php shell code on line 1

InvalidArgumentException: An offset must not begin with \0 or be empty in php shell code on line 1

Call Stack:
   16.7554      63916   1. {main}() php shell code:0

Expected result:
----------------
Same as for arrays.

php > $foo = array();
php > $foo[''] = 'lala';
php > var_dump($foo);
array(1) {
  [""]=>
  string(4) "lala"
}


Actual result:
--------------
PHP Fatal error:  Uncaught exception 'InvalidArgumentException' with message 'An offset must not begin with \0 or be empty' in php shell code:1
Stack trace:
#0 php shell code(1): unknown()
#1 {main}
  thrown in php shell code on line 1

InvalidArgumentException: An offset must not begin with \0 or be empty in php shell code on line 1

Call Stack:
   16.7554      63916   1. {main}() php shell code:0

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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2008-08-14 12:45 UTC] lstrojny@php.net
In 5.3 it behaves differently:

$ php -r '$a = new ArrayObject(); $a[''] = "foo"; var_dump($a);'
object(ArrayObject)#1 (1) {
  ["storage":"ArrayObject":private]=>
  array(1) {
    [0]=>
    string(3) "foo"
  }
}

 [2008-12-30 23:34 UTC] colder@php.net
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
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