: Track down segmentation faults in PHP? I'm looking for a relatively painless way to track down segmentation faults in PHP (as reported in the Apache error log). This is my LAMP setup at the

@Reiling115

To debug PHP segfaults you'll normally make a new .php file (so that it does not interfere with your main code) like so (calling it my_first_debugger.php):

<?php
include('annoying_caller_page_that_crashes.php');
?>


Then run gdb php. If gdb is not installed or the gdb/php binaries are not in your path there will be errors so use YaST2 to install everything required (get the development/debug libraries for php too as they usually include debugging symbols).

You'll get output like:

GNU gdb x.x
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later gnu.org/licenses/gpl.html This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
(gdb)


Then just do a run my_first_debugger.php in the command line.

Look for -dev and -dbg packages if there are messages like (no debugging symbols found) or you may not see the name of the function being called.

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@Speyer207

May I suggest looking at sourceforge.net/tracker/index.php?func=detail&aid=1692166&group_id=7130&atid=107130 and gallery.menalto.com/node/62436#comment-228570?
There seem to be common problems with either using apache_setenv or gzipping the URL twice (depending on the scenario - the former seems more likely with the thumbnails not appearing):


I believe that the problem is that mod_deflate tries to gzip the data a
second time based on the URL, which results in breakages on some systems.
Telling it not to gzip the files that we're sending helps out in this
case.





There may be a bug in PHP. Try adding $gallery->setConfig('apacheSetenvBroken', 1); to your config.php to disable using the apache_setenv() function


Appreciate this is not the answer to the question you are asking (beyond using Zend Framework with plugins or command line php and gdb I do not know how to debug segfaults in PHP) but it may help.

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