Simply add admin notices for all post saving hooks.
You can either set the notice using set_notice_status or wrap your hook with with_error_notice, then all the errors will be catched and send displayed as a notice on the admin UI.
- Gutenberg notices
- Classic editor notices
composer require koko-ng/admin-notice
require 'vendor/autoload.php';
add_action('acf/save_post', \Admin_Notice\with_error_notice( 'my_acf_save_post') );
function my_acf_save_post( $post_id ) {
// You can use `\Admin_Notice\Exception` to set a notice level.
throw new \Admin_Notice\Exception("Error message", 0, \Admin_Notice\NoticeLevels::Warning);
}
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