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Bug #47050 mysqli_poll() modifies improper variables
Submitted: 2009-01-09 13:06 UTC Modified: 2009-01-12 14:05 UTC
From: vrana@php.net Assigned: mysql (profile)
Status: Closed Package: MySQLi related
PHP Version: 5.3.0alpha4-dev OS: Windows
Private report: No CVE-ID: None
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 [2009-01-09 13:06 UTC] vrana@php.net 
Description:
------------
mysqli_poll() modifies the variable which was assigned to variables passed to mysqli_poll().

The reason probably is that mysqli_poll() doesn't copy zvals on write as it should.

Reproduce code:
---------------
<?php
$link1 = mysqli_connect();
$link1->query("SELECT 'test'", MYSQLI_ASYNC);
$all_links = array($link1);
$links = $errors = $reject = $all_links;
mysqli_poll($links, $errors, $reject, 1);
print_r($all_links);


Expected result:
----------------
Array
(
    [0] => mysqli Object
)

Actual result:
--------------
Array
(
)

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 [2009-01-11 00:14 UTC] felipe@php.net 
It's looks expected, Jakub.

See the prototype:
public int mysqli::poll ( array &$read , array &$error , array &$reject , int $sec [, int $usec ] )
int mysqli_poll ( array &$read , array &$error , array &$reject , int $sec [, int $usec ] )
 [2009-01-12 09:32 UTC] vrana@php.net 
The modification of $links is not the problem, it works as expected. The problem is in modification of $all_links which was not passed to mysqli_poll() at all.
 [2009-01-12 10:53 UTC] johannes@php.net 
mysqli_poll is missing arginfo telling it needs a reference so the engine can't properly separate the zvals. Will fix that when done with my current fix.
 [2009-01-12 14:05 UTC] johannes@php.net 
This bug has been fixed in CVS.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
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