#25831 [WFx]: overload/__call breaks method Pass by, and return by reference

[alan_k]

 ID:               25831
 Updated by:       [EMAIL PROTECTED]
-Summary:          overload/__call breaks method Pass by reference
 Reported By:      viking at dslnorthwest dot net
 Status:           Wont fix
 Bug Type:         Scripting Engine problem
 Operating System: all
 PHP Version:      4.3.4RC2-dev
 New Comment:

Updating bug Title for reference
overload also breaks return by reference.


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

[2003-10-27 13:11:04] [EMAIL PROTECTED]

The issue was confirmed to have much to do with the current engine's
limitation. So then we're trying to make sure that this problem will be
fixed in php5.


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

[2003-10-10 22:12:29] [EMAIL PROTECTED]

simple script to reproduce:

<?

 
class no_problem  {
        function pass_by_reference(&$ref)       {
                $ref = "Pass by reference works";
        }
}



class problem  { 
        function pass_by_reference(&$ref)       {
                $ref = "Pass by reference works";
        }
        // simple dummy call implementation..
    function __call($method,$params,&$return) {
                if ($method == get_class($this)) {
                        return true;    
        }
                return false; // not found!
        }
}

overload('problem');


$good = &new no_problem;
$bad = &new problem;

$message = "Pass by reference does not work!";
$good->pass_by_reference($message);
print "$message\n";



$message = "Pass by reference does not work!";
$bad->pass_by_reference($message);
print "$message\n";


?>


should print 
Pass by reference works
Pass by reference works

actually prints
Pass by reference works
Pass by reference does not work!

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

[2003-10-10 19:30:28] viking at dslnorthwest dot net

Description:
------------
When extending the DB_DataObject class using PHP 4.3.3, 
pass-by-reference calls to class methods don't work. 
After removing the call to overload() at the bottom of 
DB_DataObject.php, references work as expected. The 
following comments at the bottom of DB_DataObject 
allude to this:

// technially 4.3.2RC1 was broken!!
// looks like 4.3.3 may have problems too.... 
if ((phpversion() != '4.3.2-RC1') && (version_compare( 
phpversion(), "4.3.1") > 0)) {
   overload('DB_DataObject');
   $GLOBALS['_DB_DATAOBJECT']['OVERLOADED'] = true;     
}

Reproduce code:
---------------
require_once("DB/DataObject.php");

class no_problem
{
        function pass_by_reference(&$ref)
        {
                $ref = "Pass by reference works";
        }
}

class problem extends DB_DataObject
{
        function pass_by_reference(&$ref)
        {
                $ref = "Pass by reference works";
        }
}

$good = &new no_problem();
$bad = &new problem();

$message = "Pass by reference does not work!";
$good->pass_by_reference($message);
print "$message\n";

$message = "Pass by reference does not work!";
$bad->pass_by_reference($message);
print "$message\n";

Expected result:
----------------
Pass by reference works 
Pass by reference works 

Actual result:
--------------
Pass by reference works 
Pass by reference does not work! 


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


-- 
Edit this bug report at http://bugs.php.net/?id=25831&edit=1