ID: 16040
Comment by: ilatypov at infradead dot org
Reported By: markus dot pfefferle at web dot de
Status: No Feedback
Bug Type: PCRE related
Operating System: Linux
PHP Version: 4.1.1
New Comment:
This also holds true for yesterday's CVS snapshot of PHP6, in Windows
XP.
I tried installing MediaWiki with the PHP6 snapshot and found that the
table prefix replacement in includes/db/Database.php:replaceVars()
returns corrupt data sporadically.
I found that pref_replace_callback() was the source of the corruption.
This statement:
$ins = preg_replace_callback(
'/\/\*(?:\$wgDBprefix|_)\*\/([a-zA-Z_0-9]*)/',
array( &$this, 'tableNameCallback' ),
$ins );
called the tableName() method through the callback tableNameCallback().
The former method returned a proper string but the end result in $ins
was corrupted.
On finding this earlier report, I looked closer at the
Database.tableName() method and found a call to preg_match() there.
Previous Comments:
------------------------------------------------------------------------
[2002-06-16 01:00:06] php-bugs at lists dot php dot net
No feedback was provided for this bug for over a month, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".
------------------------------------------------------------------------
[2002-04-09 17:00:00] [email protected]
the code below works fine for me. please provide a complete example of
code that fails.
function funcB($arr) {
return 'whatever';
}
function funcA($arr) {
$someotherhaystack = '%value1% foo %value2%';
$t = preg_replace_callback("/%value([0-9]+)%/", "funcB",
$someotherhaystack);
return $t; // $t still makes sense here
}
$haystack = '%text12% bar %text13%';
echo preg_replace_callback("/%text([0-9]+)%/", "funcA", $haystack);
------------------------------------------------------------------------
[2002-03-13 07:31:50] markus dot pfefferle at web dot de
A preg_replace_callback() that calls a callback function which in turn
makes use of a preg_replace_callback() function too, will not work
correctly. The first preg_replace_callback() will substitute gibberisch
even though the callback function returned a valid string.
Example:
function funcB($arr)
{
...
return $whatever;
}
function funcA($arr)
{
...
$t = preg_replace_callback("/%value([0-9]+)%/", "funcB",
$someotherhaystack)
return $t; // $t still makes sense here
}
echo preg_replace_callback("/%text([0-9]+)%/", "funcA", $haystack);
// but whatever funcA returned, just some gibberisch is substituted for
/%text[0-9]+%/
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=16040&edit=1
