php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #20251 Can't assign values to array in loop.
Submitted: 2002-11-04 18:38 UTC Modified: 2002-11-05 19:01 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:0 (0.0%)
Same OS:0 (0.0%)
From: director at misny dot com Assigned:
Status: Wont fix Package: Arrays related
PHP Version: 4.2.1 OS: linux 2.4.7-10enterprise #1 SMP
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: director at misny dot com
New email:
PHP Version: OS:

 

 [2002-11-04 18:38 UTC] director at misny dot com 
I can't get values assigned to arrays inside a loop when loop repetition is high.

<?
$a=80000;
$b=1;
for($i=0; $i<$a; $i++){
	$c[$i]=$b;
}
echo count($c);
?>

Sometimes, this will run, sometimes, it won't.  Cutoff of at what number $a this script works varies.  Sometimes, it works when $a=70000, sometimes it won't.

This is with using (8)Xeon 700-2 processors with 2GB RAM on a very busy apache/php only server.  On our test machine (doing nothing) with (2) P4-1000 processors, $a= can be as high as 130000.

Am I just missing something?



Configure command:
'./configure' '--with-mysql=../mysql' '--with-apache=../apache_1.3.24' '--enable-track-vars' '--enable-mbstring'

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2002-11-04 18:43 UTC] nicos@php.net 
Sorry, but your problem does not imply a bug in PHP itself.  For a
list of more appropriate places to ask for help using PHP, please
visit http://www.php.net/support.php as this bug system is not the
appropriate forum for asking support questions. 

Thank you for your interest in PHP.
 [2002-11-04 18:50 UTC] director at misny dot com 
I apologize if you think this is not the appropriate place, but I had confered with a couple of other developers who experienced the same problem when this was run, so I figured it was a php bug.  I'll do more research (trying it on windows, maybe) and see what I come up with.  Sorry to waste your time.
 [2002-11-04 18:50 UTC] nicos@php.net 
ilia said it was reproductile with any values larger than 66000
 [2002-11-04 19:12 UTC] director at misny dot com 
The following works in place of array, so I'll try and see how much memory and CPU this uses.

<?
$a=1000000;
for($i=0; $i<$a; $i++){
	$d="ar".$i;
	$$d=$i;
}
echo $ar5943;
?>
 [2002-11-04 19:23 UTC] nicos@php.net 
Okay, Please join a gdb backtrace.
 [2002-11-05 08:08 UTC] iliaa@php.net 
In ZE1 use array_fill() to fill in an array with the same value, it'll be faster and work. In ZE2 your code will work fine as is, still array_fill() would probably be a better alternative.
 [2002-11-05 17:46 UTC] director at misny dot com 
Thank you.  I don't know much about the development of Zend engine, so I guess I'll wait for ZE2 to be included in future release of PHP.

I had posted a bad sample code.  I wasn't trying to fill an array with the same value, so it should have been:


<?
$a=80000;
for($i=0; $i<$a; $i++){
	$c[$i]=$i;
}
echo count($c);
?>

And, by the way, this also crashes when $a gets too high or is coupled with another similar loop in the same script:

<?
$a=1000000;
for($i=0; $i<$a; $i++){
	$d="ar".$i;
	$$d=$i;
}
echo $ar5943;
?>


If these work in ZE2, should I bother to do a gdb backtrace using ZE1?
 [2002-11-05 19:01 UTC] iliaa@php.net 
I've tried the last two examples you've provided. They work just fine on 4.2.3 and 4.3.0-pre2 on an SMP linux server.

Setting the status of the report back to Won't Fix based on the initial report.
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved. 		Last updated: Sat Dec 21 18:01:29 2024 UTC