ID: 13433
Updated by: phanto
Reported By: [EMAIL PROTECTED]
Status: Open
Bug Type: COM related
Operating System: Windows NT 4 Server
PHP Version: 4.0CVS-2001-09-25
New Comment:

fixed in cvs

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

[2001-09-25 11:21:37] [EMAIL PROTECTED]

In PHP 4.07 (RC1, RC2 and latest snapshot, standard windows build) returning a boolean 
from a COM object is broken.

I reported this on PHP-QA a while ago but there was no response to it.  That report 
was primarily to do with returning booleans from a database accessed via an ADO COM 
object.  But now I've found it's true for all booleans.

When you have a COM object returning a boolean, testing that boolean for 'trueness' 
fails.

The following script:

<?php

$obj = new COM('com.object');

$arg = $obj->TestFunc();    // Simple function that just returns TRUE

var_dump($arg);

if ($arg == TRUE)
   echo "arg is true<BR>";
elseif ($arg == FALSE)
   echo "arg is false<BR>";
else
   echo "arg is something else<BR>";

if ($arg)
  echo "<BR>arg is true, but not equal to true<BR>";
?>

produces this output:

>bool(true)
>arg is something else
>
>arg is true, but not equal to true
>

Basically, if you test for equality to 'true' it fails, but it's also not false.  But 
if you just test directly on the value it works fine.

I stepped through the source and it appears to be due to the way comparison of 
booleans is done.  The COM object returns a boolean by creating a Variant of type BOOL 
and value -1.  whereas PHP creates a boolean of type BOOL and value 1.  The comparison 
then messes up due to this, I think.

I've also tried this with PHP 4.06 and the problem doesn't occur in that version

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



Edit this bug report at http://bugs.php.net/?id=13433&edit=1


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