Do you know where I can get this info????????

The CSS disappearing is no accident – read about it here: Annual CSS Naked Day. Should be back to normal after tomorrow.

Thanks!

In the meantime, I’ve updated the code, and tested the posted version – it should be working now.

Thanks for the reference you posted – should be a great resource for anyone who needs more help with this.

It looks there’s a missing “<?” on line 25, among “” and “}”

The explanation about “add meta box function” in the Wordpress Codex http://codex.wordpress.org/Function_Reference/add_meta_box
is much more complicated, though there is a security verification we are not doing.

Well, I have changed your code a bit in order to achieve my needs and added all reference I could find about the needed functions: http://pastie.org/440128

Once more, thank you.

$postID is passed in via this line:

add_action(’save_post’, ‘custom_add_save’);

The save_post action hook (see a complete list of action hooks here) passes in the post id of the post that is being saved. So whenever you save a post, this action will call your function (in this case, custom_add_save), with the post id as the first parameter.

We then use the post id that has been passed in to find the parent id with the function wp_is_post_revision(). wp_is_post_revision will return a post id (which will evaluate to true in an if statement) if the post is a revision, or false if it is the original post. So, with this line:
if($parent_id = wp_is_post_revision($postID)){
$postID = $parent_id;
}
we check if the post is a revision, and if it is, we set the $postID variable to the post id of the parent post, because this is the one we want.

At this point, however, something is definitely wrong – I forgot to change the $_POST variables that get checked to match the rest of the code. At this point, you want to check each of your options to see if they’ve been posted – instead of if($_POST['columns']), it should be
if ($_POST['cpi_dropdown_options'])
and
if ($_POST['cpi_text_option']) {

I’ve changed the code in the post to be accurate.

Good luck!

However, and please excuse me if I am wrong, it looks that it is missing something in the final part of your code. For example, where “$parent_id” and “$postID” is coming from?

function custom_add_save($postID){
// called after a post or page is saved
if($parent_id = wp_is_post_revision($postID)){
$postID = $parent_id;
}

if($_POST['columns']){
update_custom_meta($postID, $_POST['columns'], ‘columns’);
}
}