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Bug #25782 require( 'require.php' ) crashing Apache 1.3.28
Submitted: 2003-10-07 20:30 UTC Modified: 2003-10-12 22:34 UTC
From: akinder at technology-x dot com Assigned:
Status: Not a bug Package: Apache related
PHP Version: 5.0.0b1 (beta1) OS: Linux RedHat 9
Private report: No CVE-ID: None
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From: akinder at technology-x dot com
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 [2003-10-07 20:30 UTC] akinder at technology-x dot com 
Description:
------------
When developing, I normally require or include all necessary files in one file top level, so that each script can require just one single file.
Normally this works fine, but starting last night, I found that if I store all these includes/requires in my typical "require.php" file and require it from my index.php, it crashes Apache.  If I delete the require.php from the directory, it works fine.  Also, if I rename the file to something like "global_includes.php" it works fine.  It only crashes if I put "require( 'require.php' );"

My other projects that use require.php still work fine, its just this one (under directory /whi7/).

Also of note, regardless to what file I require within my index.php, as long as require.php exists in the directory, it crashes Apache.  httpd -l  shows mod_php5

Reproduce code:
---------------
require.php:
<?php
require( 'openwhi/smaAPI.php' );

$api = new smaAPI();

?>

index.php:

<?php
require( 'require.php' );
//rest of page
?>

Expected result:
----------------
It should just require the require.php file and work like normal, just like the other projects.

Actual result:
--------------
The browser hangs, then stops loading the requested document and just sits on the one already open.  Apache's error_log shows:

[Tue Oct  7 20:38:29 2003] [notice] child pid 2858 exit signal Segmentation fault (11)

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 [2003-10-07 20:53 UTC] sniper@php.net 
Please try using this CVS snapshot:

  http://snaps.php.net/php5-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5-win32-latest.zip

And if this happens with latest CVS snapshot, please provide
GDB backtrace of the crash.
 [2003-10-08 16:58 UTC] akinder at technology-x dot com 
I'm using the php5 build 200310081730.
The crash still occurs, but when I run httpd -X through gdb, it just says "Program exited with code 01" and there isn't any stack.

I've also found some other things I need to add.
The directory struct that is crashing is as so:

/ (toplevel htdocs)
/whi7/ (working directory)
/whi7/require.php (if file is present, it crashes)
/whi7/index.php
/whi7/_inc/functions.php ( function file for whi7 )
/whi7/openwhi/smaAPI.php (filed required in require.php above)
/whi7/openwhi/require.php (OpenWHI's require.php file)
/whi7/openwhi/_inc/functions.php (OpenWHI's function file)

What I've found is that, if require.php is present, it won't crash.  BUT if require.php is present, AND it is requiring /openwhi/smaAPI.php, it will crash.
If /whi7/_inc/functions.php is required along with /openwhi/smaAPI.php, it won't crash, but says that "sma_data()" function didn't exist (which is a function in /openwhi/_inc/functions.php ).

The smaAPI.php file requires "require.php" in the /whi7/openwhi/ directory, which in turn requires the functions.php file from /whi7/openwhi/_inc/.

I'm beginning to think that PHP is entering some sort of infinite loop, if the /whi7/ require.php is named require.php and requires smaAPI, which requires require.php (under the /openwhi/ subdirectory)

Damn I've confused myself.. I'm not for sure if this is still a bug or just bad coding practice on my part.
 [2003-10-12 22:34 UTC] sniper@php.net 
It's not PHP bug, you end up in a recursive infinite loop.
What you're doing is bad pracise, use require_once() and preferrably absolute paths when possible.

(Free hint: Try to minimize the use of require/include always, they're very expensive, rather have big files with everything than all that split to several small files)
 
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