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Bug #8638 PHP handles permission problems ungracefully rather than letting Apache do it
Submitted: 2001-01-10 10:31 UTC Modified: 2001-05-16 07:43 UTC
From: jon at serf dot org Assigned:
Status: Closed Package: Apache related
PHP Version: 4.0.5 OS: Linux 2.2.17
Private report: No CVE-ID: None
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From: jon at serf dot org
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 [2001-01-10 10:31 UTC] jon at serf dot org 
I'm using Apache 1.3 with the config line:
AddType application/x-httpd-php php
When the permissions on any .php file are not set correctly for Apache to read them, the error:
Warning: Failed opening '/path/to/page.php' for inclusion (include_path='/path/to/phplib') in Unknown on line 0
appears.
The same problem still occurs with include_path='.:/path/to/phplib' in php.ini.
This is user-hostile - what ought to happen would be that Apache's normal 403 error mechanism should be invoked.

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 [2001-03-31 08:08 UTC] cynic@php.net 
Does it still happen? IIRC it was fixed.
 [2001-04-02 05:07 UTC] jon at serf dot org 
Yes, still happens with php4.04pl1.
 [2001-05-08 09:17 UTC] jon at serf dot org 
Still happens with php 4.0.5.
 [2001-05-16 02:47 UTC] sniper@php.net 
RTFM:

http://www.php.net/manual/en/function.set-error-handler.php
 [2001-05-16 07:43 UTC] jon at serf dot org 
That's a complete red herring; if file perms prevent your
script from even being read, it can't get as far as calling
set_error_handler().

However, after some further digging, I have discovered a
workaround; if you set auto_prepend_file in your php.ini
file, and call set_error_handler in that, it will be
triggered when the error above is generated. And if you put
code in it like:

if (($level == E_WARNING) && ($file == "Unknown")
    && ($line == 0)) {
  header("Location: /path/to/errordocument.html");
  exit;
}

then this will emulate Apache's normal behaviour when it
finds a file with bad permissions.

It's only a workaround, but as no-one seems interested in
fixing the underlying problem, it'll have to do.
 
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