ID: 17307
User updated by: fcartegnie at nordnet dot fr
Reported By: fcartegnie at nordnet dot fr
-Status: Bogus
+Status: Open
Bug Type: Arrays related
Operating System: Linux
-PHP Version: 4.2.1
+PHP Version: 4.4.5
New Comment:
Still broken on 4.4.5...
Still using homemade usort routine for 4 years now.
The usort functions really needs to be fixed !
Before usort()<br>
Value: E<br>
Value: C<br>
Value: B<br>
Value: D<br>
Value: A<br>
<p>After usort()<br>
Value: A<br>
Value: D<br>
Value: B<br>
Value: C<br>
Value: E<br>
Previous Comments:
------------------------------------------------------------------------
[2002-06-26 08:12:55] david dot derr at milesmedia dot com
Hi all. I think this is still a bug as I can partially recreate the
behaviour that [EMAIL PROTECTED] reported.
On a script that uses a function passed to usort that always returns 0
(implying equal values), I am seeing that the order of elements in the
array is being modified. The only reason I consider this a bug is
because that was not the case in the earlier version I tested. Here
are the details:
-The code I used on both systems:
<?
//The function usort will use. Returns 0 implying that every
comparison is equal.
function fake_sort($left, $right){
return 0;
}
//create our aTest array and add some data to it
$aTest = array();
$aTest[] = "E";
$aTest[] = "C";
$aTest[] = "B";
$aTest[] = "D";
$aTest[] = "A";
//output the order of elements in the array before running usort on
it.
reset($aTest);
echo "Before usort()<br>\n";
while(list($key, $val) = each($aTest)){
echo "Value: ".$val."<br>\n";
}
//sort it
usort($aTest, "fake_sort");
//output the order of elements in the array after running usort on it.
reset($aTest);
echo "<p>After usort()<br>\n";
while(list($key, $val) = each($aTest)){
echo "Value: ".$val."<br>\n";
}
?>
-Incorrect (unexpected) Results
System:
RH 7.2, Apache 1.3.26, PHP 4.2.1
Output:
Before usort()
Value: E
Value: C
Value: B
Value: D
Value: A
After usort()
Value: A
Value: D
Value: B
Value: C
Value: E
-Correct (expected) Results
System:
RH 7.2, Apache 1.3.26, PHP 4.1.2
Output:
Before usort()
Value: E
Value: C
Value: B
Value: D
Value: A
After usort()
Value: E
Value: C
Value: B
Value: D
Value: A
------------------------------------------------------------------------
[2002-06-17 06:52:12] timebreaker at newmail dot ru
Hi!
It's really a problem. I tried to write simple ascending sort routine
and got strange results too. Met the conditions at Intel
P-133/Win98/Apache2.0.35/PPH4.2.0 and PHP4.2.1, it doesn't matter what
the version is. In 4.0.6/4.1.x everything works...
------------------------------------------------------------------------
[2002-06-04 13:58:40] [EMAIL PROTECTED]
Heh, ok. Still better then a bug in PHP :) thx.
------------------------------------------------------------------------
[2002-06-04 13:44:21] mauf at franzoni dot info
I fixed the problem in my sort routine... it works now (for 4.2.1, so
far it seems it was 4.0.6 the buggy one as it has worked for a long
while). So far there may be at most a backward compatibility issue (I
still have to check back in 4.0.6) but it is no longer worth the
critical status for sure...
sorry for the bothering,
cheers, mauro
------------------------------------------------------------------------
[2002-06-04 12:00:07] mauf at franzoni dot info
No, I hit the problem on a P3 first... currently testing on a celeron -
both using apache 2.0.36, debian with 2.4.18 on p3, rh7.2 (2.4.7-10) on
celeron.
here is the config, if it can helps:
./configure \
--prefix=/usr/local/php4-200206040600 \
--with-mysql=/usr/local/mysql-3.23.49 \
--with-apxs2=/usr/local/httpd-2.0.36/bin/apxs \
--enable-track-vars \
--enable-sigchild \
--enable-shared \
--enable-cxx \
--enable-cli=yes
(I tried to track it a while but I get scrambled when it comes into the
zend modules :-( )
------------------------------------------------------------------------
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the rest of the comments, please view the bug report online at
http://bugs.php.net/17307
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