#31186 [Opn->Fbk]: Inconsistent datatype for offset when using ArrayAccess

[tony2001]

 ID:               31186
 Updated by:       [EMAIL PROTECTED]
 Reported By:      Jason at AMP-design dot net
-Status:           Open
+Status:           Feedback
 Bug Type:         Zend Engine 2 problem
 Operating System: Windows 2003 / CentOS 3
 PHP Version:      5.0.3
 New Comment:

Please try using this CVS snapshot:

  http://snaps.php.net/php5-STABLE-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5.0-win32-latest.zip

Please, try CVS snapshot, I can't reproduce it under Linux.


Previous Comments:
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[2004-12-19 17:33:28] Jason at AMP-design dot net

Description:
------------
On Windows 2003 / PHP 5.0.3 / Apache 2.0.52 I get an invalid data type
for the $index parameter for offsetGet (and probably for other offset*
methods). 

As you can see from the result I get, the vardump returns $index as
having 'UNKNOWN' as the datatype.

It does appear that running this in PHP 5.0.2 / CentOS 3 (RHEL3) /
Apache 2.0.48 seems to work OK and give the expected result. I don't
know if this is because of a difference caused by the PHP version or
the OS it's self.

Changing $index == NULL seems to shut PHP up about this werid error,
however this is besides the point, as PHP shouldn't be creating
variables of an 'UNKNOWN' type, and should be producing consistent
results across platforms for this sort of stuff.

Reproduce code:
---------------
header('Content-type: text/plain');
class FooBar implements ArrayAccess {
        private $array = array();

        public function offsetExists($index) {
                return isset($this->array[$index]);
        }

        public function offsetGet($index) {
                /* index is NULL because we are assigning into NULL */
                if ($index === NULL) {
                        echo 'Get on NULL'."\r\n";
                        $this->array[] = new self();
                        return end($this->array);
                }
                var_dump($index);
                return $this->array[$index];
        }

        public function offsetSet($index, $value) {
                if ($index === NULL) {
                        echo 'Set on NULL'."\r\n";
                        $this->array[] = $value;
                        return;
                }
                $this->array[$index] = $value;
        }

        public function offsetUnset($index) {
                unset($this->array[$index]);
        }
}

$i = 0;
$foo = new FooBar();
$foo[] = $i++;
$foo[] = $i++;
$foo[] = $i++;
/* calls GET on $foo[] before calling set on $foo[]['test']
 * as it needs to have some contents in $foo[] for ['test'] to
 * be set into
 */
$foo[]['test'] = $i++;

print_R($foo);

Expected result:
----------------
Set on NULL
Set on NULL
Set on NULL
Get on NULL
FooBar Object
(
    [array:private] => Array
        (
            [0] => 0
            [1] => 1
            [2] => 2
            [3] => FooBar Object
                (
                    [array:private] => Array
                        (
                            [test] => 3
                        )

                )

        )

)

Actual result:
--------------
Set on NULL
Set on NULL
Set on NULL
UNKNOWN:0
<br />
<b>Warning</b>:  Illegal offset type in <b>D:\Documents\Web
Development\spl_test.php</b> on line <b>18</b><br />
<br />
<b>Fatal error</b>:  Objects used as arrays in post/pre
increment/decrement must return values by reference in
<b>D:\Documents\Web Development\spl_test.php</b> on line <b>41</b><br
/>




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