Wordpress remove_meta_box issue - wordpress

Question

I run into a problem trying to get remove_meta_box() to work
/** remove metabox for catchkathmandu options
*/
function vpm_remove_meta_box() {
remove_meta_box( 'catchkathmandu-options', 'post', 'normal' );
remove_meta_box( 'authordiv' , 'page' , 'normal' ); //removes author
}
add_action( 'add_meta_boxes', 'vpm_remove_meta_box' );
The point is I dont want contributors and authors to edit the site design, so I wanted to remove the catchkathmandu-options. the code obviously does not reflect the condition, the codex for this function supplies the solutions for that but this code at the besic step, still isnt working - I switched back to Twenty Sixteen theme and put in the authordiv section simply to test. But still no dice.
It's added to child theme functions.php
Have I taken the wrong path and am I looking at the wrong thing entirely?
Any help appreciated!

Answer 1

I suppose that you are using a theme called "Catch katHmandu", and you want to remove a meta box for everyone except Admins.
Here is the usage of remove meta box:
remove_meta_box( $id, $page, $context );
And the Reference on the codex: https://codex.wordpress.org/Function_Reference/remove_meta_box
As you can read on the codex, $id is the current id of the div that you want to remove. Let's say that you want to remove "Tags box", if look for its container id you will find:
<div id="tagsdiv-post_tag" class="postbox">
...
</div>
And if you want to remove tags meta box, your code will look like this:
if (!is_admin()) :
function my_remove_meta_boxes() {
remove_meta_box('tagsdiv-post_tag', 'page', 'normal');
}
add_action( 'admin_menu', 'my_remove_meta_boxes' );
endif;
Look for the id of the meta box that you want to remove and remplace "tagdiv-post_tag" from code above with your id.
If you like my answer click the top arrow, as a coder it would mean a lot for me. Thanks!
EDIT:
As #AndrewSeabrook say, try using admin_menu hook instead of add_meta_boxes in your function.