#25951 [Opn]: Error suppression operator + reference return statement => corrupt func. params

[dand at codemonkey dot ro]

 ID:               25951
 User updated by:  dand at codemonkey dot ro
 Reported By:      dand at codemonkey dot ro
 Status:           Open
 Bug Type:         Unknown/Other Function
 Operating System: Debian Linux 3.0
 PHP Version:      4.3.3
 New Comment:

Sorry, the actual code producing the results above is:

class Foo {
        var $hash;

        function  & getElement($name) {
                return @$this->hash[$name];
        }       
        
        function bar($a, $b, $c)
        {
                print "BAR: $a, $b, $c<br>";
        }       
}

$f = new Foo();

for ($k = 0; $k < 3; $k++) {
        $t = $f->getElement($k);
        $f->bar(1, 2, 3);
}


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

[2003-10-22 09:43:40] dand at codemonkey dot ro

Description:
------------
The code + results should be pretty self explainatory.

A workaround would be to remove either the reference operator "&
getElement" or the error suppression operator "@$this->hash".

PS: I know that using @ instead of isset() is wrong, especially in this
situation...

Reproduce code:
---------------
class Foo {
        var $hash;

        function  & getElement($name) {
                return @$this->hash[$name];
        }       

        function bar($a, $b, $c, $d)
        {
                print "BAR: $a, $b, $c, $d<br>";
        }       
}

$f = new Foo();

for ($k = 0; $k < 3; $k++) {
        $t = $f->getElement($k);
        $f->bar(1, 2, 3, 4);
}

Expected result:
----------------
BAR: 1, 2, 3
BAR: 1, 2, 3
BAR: 1, 2, 3

Actual result:
--------------
BAR: 1, 2, 3
BAR: 3, 3, 3
BAR: 3, 3, 3

[If it helps, in PHP 4.1.2 the actual result is:
BAR: 3, 3, 3
BAR: 3, 3, 3
BAR: 3, 3, 3
]


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


-- 
Edit this bug report at http://bugs.php.net/?id=25951&edit=1