#26994 [Bgs]: extract() overwrites content of superglobal
| From: | kavol at email dot cz | Date: | Sun, 25 Jan 2004 20:09:49 +0000 |
| Subject: | #26994 [Bgs]: extract() overwrites content of superglobal | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-53868@lists.php.net to get a copy of this message | ||
ID: 26994
User updated by: kavol at email dot cz
Reported By: kavol at email dot cz
Status: Bogus
Bug Type: Arrays related
Operating System: linux (any?)
PHP Version: 4.3.4
New Comment:
> RTFM about sessions and how to use them correctly.
please could you be more specific?
of course I have read about sessions and I can't remeber of
any place saying that the contents of $_SESSION[something]
can be randomly overwritten ...
or do you mean that i left out session_start() from the
example so as many other lines of the original code?
> This has nothing to do with extract().
if a variable's value is changed after calling extract()
then it has to do something with what?
p.s. as for reproducing the error with newer snapshot: I
decided to try to recompile apache - now I'm stuck with
that, damn :-(
Previous Comments:
------------------------------------------------------------------------
[2004-01-24 23:52:38] sniper@php.net
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php
RTFM about sessions and how to use them correctly. This has nothing to
do with extract().
------------------------------------------------------------------------
[2004-01-23 17:45:08] kavol at email dot cz
unfortunately, I am unable to build the apache module from
that source ... "configure --with-apxs2=/usr/sbin/apxs2"
says this:
[...]
checking for Apache 2.0 filter-module support via DSO
through APXS... no
checking for Apache 2.0 handler-module support via DSO
through APXS... expr: non-numeric argument
./configure: line 5114: test: : integer expression expected
./configure: line 5116: test: : integer expression expected
yes
[...]
which seems to be a bit suspicious (although the result is
"yes") and then "make" goes well except that the module is
missing ... I got cli version (working...) but that's all
I'll try to work it out asap, until then I can't confirm if
the CVS version is ok for me, sorry ...
------------------------------------------------------------------------
[2004-01-21 11:55:49] iliaa@php.net
Please try using this CVS snapshot:
http://snaps.php.net/php4-STABLE-latest.tar.gz
For Windows:
http://snaps.php.net/win32/php4-win32-STABLE-latest.zip
Works fine with latest CVS of PHP4.
------------------------------------------------------------------------
[2004-01-21 11:02:56] kavol at email dot cz
Description:
------------
after extract()ing an array containing a "key" => "data" with "key"
being the same name as in $_SESSION, not only $key = "data", but the
content of $_SESSION["key"] gets overwritten with "data" too
Reproduce code:
---------------
$jazyky = array (array ("jazyk" => "Četina", "kod" =>
"cs", "jak"
=> "česky"), array ("jazyk" => "English",
"kod" => "en", "jak" =>
"English"));
$_SESSION["jazyk"] = "cs";
$jazyk = $_SESSION["jazyk"]; // this IS NOT assigment by reference !
(from manual: "the assignment copies the original variable to the new
one")
echo $_SESSION["jazyk"];
foreach ($jazyky as $j) {
extract ($j);
echo "<a href='?jazyk=$kod'><img alt=\"$jak\"
class=\"vlajka\"
src=\"images/flag-$kod.png\"> $jazyk</a><br>";
echo $_SESSION["jazyk"];
};
$jazyk = $_SESSION["jazyk"]; // this is the problem - I wanted to
restore the previosly overwritten $jazyk but I found $_SESSION["jazyk"]
to be overwritten too!
Expected result:
----------------
cs
<a href='?jazyk=cs'><img alt="česky" class="vlajka"
src="images/flag-cs.png"> Četina</a><br>
cs
<a href='?jazyk=en'><img alt="English" class="vlajka"
src="images/flag-en.png"> English</a><br>
cs
Actual result:
--------------
cs
<a href='?jazyk=cs'><img alt="česky" class="vlajka"
src="images/flag-cs.png"> Četina</a><br>
Četina
<a href='?jazyk=en'><img alt="English" class="vlajka"
src="images/flag-en.png"> English</a><br>
English
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=26994&edit=1