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Request #61455 Warn when ini_set()'ing certain directives
Submitted: 2012-03-20 13:56 UTC Modified: 2021-03-28 04:22 UTC
Votes:1
Avg. Score:2.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:0 (0.0%)
Same OS:0 (0.0%)
From: brad at njoe dot com Assigned: cmb (profile)
Status: No Feedback Package: PHP options/info functions
PHP Version: 5.3.10 OS: N/A
Private report: No CVE-ID: None
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 [2012-03-20 13:56 UTC] brad at njoe dot com
Description:
------------
If ini_set() is called to set any PHP directive whose 'Changeable' attribute (e.g. 
as per man page http://php.net/ini.list) is not 'PHP_INI_USER' or 'PHP_INI_ALL', 
an error message could be generated to advise the developer that the statement 
will have no effect. In other words, don't quietly allow directives to be changed 
when they've already taken effect by the time the script is executed (thus 
changing them via ini_set() won't ever do anything).

Test script:
---------------
<?php

ini_set('allow_url_fopen', '1');

Expected result:
----------------
Warning: Changing PHP directive at runtime has no effect in <code> on line 3


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 [2012-03-20 14:01 UTC] brad at njoe dot com
Errata #1 - Looks like PHP is intelligent enough to report the unchanged values 
for such directives when doing a phpinfo() (e.g. you can't ini_set() the 
'allow_url_fopen' directive and see the "Local Value" change on the phpinfo() 
page).

Thus, the "don't quietly allow directives to be changed" above should probably 
have been "don't quietly accept requests to change directives" or something of the 
sort.
 [2021-03-16 14:54 UTC] cmb@php.net
-Status: Open +Status: Feedback -Assigned To: +Assigned To: cmb
 [2021-03-16 14:54 UTC] cmb@php.net
ini_set() returns false if the directive could not be changed[1];
isn't checking the return value sufficient?

[1] <https://3v4l.org/hvRAg>
 [2021-03-28 04:22 UTC] php-bugs at lists dot php dot net
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Re-Opened". Thank you.
 
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