Add a post (category already defined for user) WordPress

staceypruim comments:

This is great if I needed each author to post to just one category. Many of the users though are registered in more than one course at a time, so I need to be able to identify multiple categories for a user.

Also, the users are often not tech savvy at all... so the website owner doesn't want them to have to think to select the category. So, I don't just want to limit their category list in the add a post screen... it has been removed from view.

I need to be able to have the action connected with a button or link text. One is on the assignments page which says "Create a blog post for this classs" and the other is one that resides on the sidebar for the blog so that while they are reading they have the option to post.

So, the solution needs to be connected to the action, if that makes sense.

Thanks so much for your time!
Stace.

Dbranes comments:

I just tested the code mentioned [[LINK href="http://forums.whirlpool.net.au/forum-replies.cfm?t=1608032&#r7"]]here[[/LINK]]

It can be called within the wp-admin like this (for logged in users):

example.com/wp-admin/edit.php?mypresetcat=13

and the following (slightly modified) code goes into the function.php:

add_action( 'admin_init', 'my_preset_category' );

function my_preset_category() {
global $user_ID;
$mycats=array(13,14); // available category id - change this
if(isset($_GET['mypresetcat'])){
$category = (int)$_GET['mypresetcat']; // get the category from the url
if(in_array($category,$mycats,TRUE)){
$post = array( // add a new post to the wordpress database
'post_status' => 'draft', // set post status to draft - we don't want the new post to appear live yet.
'post_date' => date('Y-m-d H:i:s'), // set post date to current date.
'post_author' => $user_ID, // set post author to current logged on user.
'post_type' => 'post', // set post type to post.
'post_category' => array($category), // set category to the category/categories parsed in your previous array
'post_title' => 'Title'
);
$insert_post = wp_insert_post($post); // insert the post into the wp db
$post_details = get_post($insert_post); // get all the post details from new post
$post_id = $post_details->ID; // extract the post id from the post details
$post_redirect = home_url().'/wp-admin/post.php?action=edit&post='.$post_id; // construct url for editing of post
wp_redirect($post_redirect);// redirect to edit page for new post.
exit;
}
}
}


ps:
This code is just a barebone proof of concept.
Extra security checks are needed.
The answer time is almost up, so I just post it like this ;-)

Mabye this will give you the idea.