How to use postbox_classes_page_id filter in WordPress

This filter allows customization of postbox classes for a specific screen and screen ID combo. With dynamic parameters $page and $id, it offers flexibility for targeting specific admin pages.

• $classes : (string[]) An array of postbox classes.

Example 1: Adding a Class to Postbox

Here’s how you can add an additional class to the postbox using this filter.

            add_filter('weplugins_postbox_classes_post_postexcerpt','weplugins_add_metabox_classes');

            function weplugins_add_metabox_classes($classes) {
                array_push($classes, 'another_class');
                return $classes;
            }
            

Example 2: Removing a Class from Postbox

Need to remove a class from the postbox? Check out this example.

            // remove the filter 
            add_filter('weplugins_postbox_classes_post_postexcerpt', 'weplugins_add_metabox_classes', 10, 1);
            

Example 3: Customizing Postbox Classes Further

Take customization a step further by manipulating the postbox classes based on conditions.

            add_filter('weplugins_postbox_classes_page_custom', 'weplugins_customize_postbox_classes');

            function weplugins_customize_postbox_classes($classes) {
                if (some_condition()) {
                    $classes[] = 'custom_class';
                }
                return $classes;
            }
            

If you need any customization or have queries, feel free to Contact Us.