#31010 [Opn]: echo a variable that was unset before breaks output

[lars_stegelitz at col dot wunderman dot com]

 ID:               31010
 User updated by:  lars_stegelitz at col dot wunderman dot com
 Reported By:      lars_stegelitz at col dot wunderman dot com
 Status:           Open
 Bug Type:         Output Control
 Operating System: Windows
 PHP Version:      4.3.9
 New Comment:

addition:

The error-suppression operator (@) in the __set/__get methods should be
omitted to see a warning in standard cases. However, it makes no
difference in case of the mentioned error...


Previous Comments:
------------------------------------------------------------------------

[2004-12-07 16:31:21] lars_stegelitz at col dot wunderman dot com

Description:
------------
When trying to echo an variable that was previously unset, no output at
all is shown. I wrote a small test case (see below)






Reproduce code:
---------------
class Test
{
        var $values;

        function Test() {
                $this->values = array();
        }
        
        function __get($key, &$value) {
                $value = @$this->values[$key];
                return true;
        }
        
        function __set($key, $value) {
                $this->values[$key] = @$value;
                return true;
        }
}

overload('Test');

$test = new Test();
$test->xyz = "test";
echo "<br/>1. {$test->xyz}";
unset($test->values['xyz']);
echo "<br/>2. {$test->xyz}";


Expected result:
----------------
1. test
Notice: Undefined variable: xyz in <sourcecode> on line <x>
2. 



Actual result:
--------------
Nothing. No output at all. No warning or error in log files or on
screen. Not even the echo *before* unsetting the variable shows up.


------------------------------------------------------------------------


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Edit this bug report at http://bugs.php.net/?id=31010&edit=1