Module development and code questions

I was wondering if there was a tool for me to run to see if I can see every line of code being executed for a given time. For example, lets say I wanted to see every line of code being executed when I view a node, how do I do that? Also, how can I monitor every query being executed for a given page?

Hi there, I'm working on my first drupal module (basically a hack of recipe.module) and I have things working up to a point: The module can be loaded in the modules list; it properly displays a form; the form posts data properly to the database; but the return screen errors with:

warning: Cannot modify header information - headers already sent by (output started at /var/www/pt2/modules/chronicle/chronicle.module:220) in /var/www/pt2/includes/common.inc on line 192.

Can someone with more experienced eyes have a look and tell me where I might be going wrong?

Hi,
I have creating several "node" system modules and on the hook_form function I build different field elements with code like this....

My code is correctly tagging the error to the correct checkbox:

<label class="option"><input type="checkbox" class="form-checkbox error" name="edit[sort2]" id="edit-sort2" value="1" /> Allow sorting on column 2?</label>

http://drupal.org/node/38829

UIEForum is a complete forum system, that is intended to replace the existing drupal forum module.
Due to it's separate database design, it can co-exist quite happily with the default drupal forum, however it is recommended that only one be enabled at a time.

This module's design is not based around the drupal node-system. It uses it's own tables for storing forum data. There is a possibility that this will change at some stage, but for now it's the easiest, and most logical method to proceed.

UIEForum was originally developed as a 'homebrew', standalone forum for www.unreal.ie - and has since been ported over to suit drupal's code structure and rules, as the site is due to move to the drupal system in the coming months. This is still a work in progress, so I fully expect there to be various bugs, however alot of work has gone into the development of the original system, and now the drupal port, so here's hoping that it's not too buggy.

The module allows for the use of groups (roles) to provide security on specific forums, and as such, can be a suitable replacement for users that are currently debating moving from a VBB (or similar) environment.
At the moment, a fixed list of smilies are available, but this will be moved to a database list soon(ish).
Development of this module is ongoing, so be sure to check back frequently.

hi

In I module album leave following the error to me when I create a album:

warning: Invalid argument supplied for foreach() in /home/susemani/public_html/modules/album/album.module on line 94.
warning: Cannot modify header information - headers already sent by (output started at /home/susemani/public_html/includes/common.inc:384) in /home/susemani/public_html/includes/common.inc on line 192.

And when attempt to put photos, when puncturing to raise the following error: