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

go to bug id or search bugs for

Bug #63957 REQUEST_TIME_FLOAT too high
Submitted: 2013-01-10 10:28 UTC Modified: 2013-01-14 01:40 UTC
Votes:3
Avg. Score:3.0 ± 1.6
Reproduced:1 of 2 (50.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: bugzilla77 at gmail dot com Assigned:
Status: Wont fix Package: *Web Server problem
PHP Version: 5.5.0alpha2 OS: win32, apache module
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: bugzilla77 at gmail dot com
New email:
PHP Version: OS:

 

 [2013-01-10 10:28 UTC] bugzilla77 at gmail dot com 
Description:
------------
$_SERVER['REQUEST_TIME_FLOAT']
is greater than
microtime(true)

introduced in PHP 5.5 alpha (1-3)



Test script:
---------------
<?=$_SERVER['REQUEST_TIME_FLOAT']-microtime(true)?>

Expected result:
----------------
positive float (PHP 5.4 OK)


Actual result:
--------------
negative float

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2013-01-11 00:36 UTC] aharvey@php.net 
microtime() and $_SERVER['REQUEST_TIME_FLOAT'] use different mechanisms to get the time: microtime() calls gettimeofday() internally, whereas $_SERVER['REQUEST_TIME_FLOAT'] uses whatever method the SAPI provides to get the request time (for instance, the apache2handler SAPI calls apr_time_as_msec()). In practice, there are likely to be slight variances between the two methods, since they do different things.

I don't see a sensible way we could change this without removing the semantics of $_SERVER['REQUEST_TIME_FLOAT'] actually being the server's request time (as opposed to just the startup time of PHP's request handling).

Marking won't fix.
 [2013-01-11 00:36 UTC] aharvey@php.net
-Status: Open +Status: Wont fix -Package: Date/time related +Package: *Web Server problem
 [2013-01-11 09:21 UTC] bugzilla77 at gmail dot com 
Currently $_SERVER['REQUEST_TIME_FLOAT'] is useless in determining the time of 
generating web pages.

I think that PHP should setting $_SERVER['REQUEST_TIME_FLOAT'] = microtime(true)
on PHP's request handling.
 [2013-01-11 09:23 UTC] bugzilla77 at gmail dot com 
Why this problem is not found in PHP 5.4?
 [2013-01-14 01:40 UTC] aharvey@php.net 
I can't reproduce this very reliably on either branch, so I don't think it's version specific as such.

Changing $_SERVER['REQUEST_TIME_FLOAT'] to be microtime(true) on startup misses the point of what the server variable represents: it's what the Web server believes the request time to be, not when the PHP interpreter was invoked.

If you want microtime(true), then set a variable to that at the top of your script.
 [2013-01-19 19:34 UTC] bugzilla77 at gmail dot com 
Maybe PHP should set the $_SERVER['REQUEST_TIME_FLOAT'] value

to

MIN of apr_time_as_msec() , microtime(true) ???????
 [2013-01-19 19:39 UTC] bugzilla77 at gmail dot com 
Test script (fixed):
--------------------
<?=microtime(true)-$_SERVER['REQUEST_TIME_FLOAT']?>

but problem still the same
 [2013-01-25 11:09 UTC] lunter2 at gmail dot com 
I can confirm this problem introduced in PHP 5.5

<?=microtime(true)-$_SERVER['REQUEST_TIME_FLOAT']?>

Max difference observed from is -1200ms !
 [2013-01-25 11:21 UTC] lunter2 at gmail dot com 
This very big problem is introduced in php 5.5.
PHP 5.4 never returns negative value.
 [2013-01-26 01:46 UTC] johannes@php.net 
Related To: Bug #64073
 [2013-01-27 18:16 UTC] adam123 at hotmail dot com 
The difference increases in time to run the server.
I am now watching -5.5 seconds.
 [2013-01-27 18:20 UTC] adam123 at hotmail dot com 
The difference increases in time to run the server (few days).
I am now watching -5.5 seconds.
After Apache restar difference -20ms.
 [2013-01-27 18:59 UTC] bugzilla77 at gmail dot com 
Sorry - this not a bug with $_SERVER['REQUEST_TIME_FLOAT']

This is problem with microtime(true).

PLEASE CLOSE THIS BUG.

I will report a new bug.
 [2013-01-27 19:09 UTC] bugzilla77 at gmail dot com 
!!!ATTENTION!!!
THIS NOT A BUG!!!
PLEASE CLOSE THIS BUG!!!

GO TO: https://bugs.php.net/bug.php?id=64085
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Fri Mar 28 03:01:29 2025 UTC