Module development and code questions

In the Taxonomy.mod if you change the param "Depth", you can change the depth result. Form what I'm seeing the Article.mod, it has the same feature and I have made a paste of the code in question below. I'm not a programer, so really I don't have clue what it actually does. But from the little I do understand it looks like it should work, but it hasn't been. could somone comment please. i;ve been chagng the $depth on line 14.

* @param $tids
* An array of term IDs to match.
* @param $operator
* How to interpret multiple IDs in the array. Can be "or" or "and".
* @param $depth
* How many levels deep to traverse the taxonomy tree. Can be a nonnegative
* integer or "all".
* @param $pager
* Whether the nodes are to be used with a pager (the case on most Drupal
* pages) or not (in an XML feed, for example).
* @return
* A resource identifier pointing to the query results.
*/
function article_select_nodes($tids = array(), $operator = 'and', $depth = 1, $pager = TRUE, $count = 0) {
if (count($tids) > 0) {
// For each term ID, generate an array of descendant term IDs to the right depth.
$descendant_tids = array();
if ($depth === 'all') {
$depth = NULL;
}
foreach ($tids as $index => $tid) {
$term = taxonomy_get_term($tid);
$tree = taxonomy_get_tree($term->vid, $tid, 1, $depth);
$descendant_tids[] = array_merge(array($tid), array_map('_taxonomy_get_tid_from_term', $tree));

Snippets offer functionality similar to standard PHP-execution filter, but I hope in more flexible manner. Site admin or power users may create named snippets of PHP-code (with access to Drupal API), then categorize and store them to the site code repository. Particular users can't view PHP-code - only snippet name and help. From user point of view - snippets are macros, which may be used in postings - nodes and comments. Macros may accept parameters which transferred to snippet code. Example: [macro], [macro|param1|param2], [link|9165].

Where are Permissions by role defined in the Database?

I have created a Module that uses the _perm hook but I am curious where it is actually stored within the system? I have looked throught the database and cannot find it under any of the tables.

I thought it would be under the variables table but did not see it in there.

Very curious because I wanted to clean up some old hooks I made. Mostly because I want to know where Drupal keeps this list.

Thanks!

I've added a bunch of new user profiles under: administer -> users -> configure -> profiles

If I want to do some simple data validation on these new fields, what is the most logical place to put my PHP code?

thanks!

I wrote this small module to add my onload stuff:

function mytheme_onload() {
  return array("MM_preloadImages('myimages.png', 'myimages2.png')");
} 

I get the following error with image/view:

Hi all.

Is it possible to have flexinode resize the images on upload?

So if a user uploads an image that is 1024x768 and 1.5mb , flexinode resizes it to become only 640x480 and 500kb?

thanks

Mr Maggoo