if ( !$value ) evaluates to TRUE when the value is 0. Alternative: if ( ! isset ( $_POST[‘_ordre’] ) ) return delete_post_meta( $post_id, ‘_ordre’ ); update_post_meta( $post_id, ‘_ordre’, $_POST[‘_ordre’] ); You don’t need add_post_meta(), the call to update_post_meta() will do that automatically.
I just wrote a plugin that does just that. It’s been submitted to the WordPress.org plugin repo earlier this week and hopefully should make an appearance soon. The plugin is officially in the WordPress.org repo. In short what you are looking for is a way to have the following code available on your post editor: … Read more
How to notify specific users when i’m posting/modifying a new post
WordPress custom admin notice still displays after wp_insert_post_data validation
I run into a similar issue. I had to remove remove_meta_box(‘slugdiv’, [‘post’, ‘page’], ‘normal’); from my code. When you remove the slugdiv meta box the slug edit box for WP does stops working.
Update post meta using save_post hook in multisite
CPT Validation to not show “Post updated.”
When you submit the form there is a new request to the server. Because global $loop_anwaelte; is populated on add_meta_box it will not be populated on save_post which fires much, much earlier in the new page load. I am pretty sure that is why your “save” isn’t working. The foreach ( $loop_anwaelte as $anwalt ) … Read more
Can’t find infinite loop cause
Validate post checking if child term is assigned