How to use extra_theme_headers filter in WordPress

extra_theme_headers filter

To use the extra_theme_headers filter, first, you have to register it using add_filter. You can write this code into the functions.php of your activated theme or in a custom WordPress Plugin.

At WePlugins, we always prefer to create a custom WordPress Plugin while using hooks so nothing breaks when you update your WordPress Theme in the future.

In the below live example, we have defined a function weplugins_modify_extra_theme_headers_defaults and registered it using add_filter. The first parameter extra_theme_headers is the name of the hook, the second parameter weplugins_modify_extra_theme_headers_defaults is the name of the function which needs to be called, the third parameter is the priority of calling the hook if the same hook is used multiple times, and the last parameter is the number of arguments (if any) to be passed in the registered function.

Sometimes, you have to remove a registered hook so you can use remove_filter to remove the extra_theme_headers filter.

Parameters

• No parameters

Live Example 1: Basic Usage

Below is an example of how you can use this hook.

    function weplugins_modify_extra_theme_headers_defaults() {
        // Update the $show variable according to your website requirements and return this variable. 
        // You can modify the $show variable conditionally too if you want.
        return $show;
    }
    // add the filter
    add_filter("extra_theme_headers", "weplugins_modify_extra_theme_headers_defaults");
    

Live Example 2: Removing the Hook

To remove a hook callback, use the example below.

    remove_filter("extra_theme_headers", "weplugins_modify_extra_theme_headers_defaults");
    

Please make sure to provide the same callback function name, priority, and number of arguments while removing the hook callback.

Live Example 3: Conditional Hook Usage

This example shows how you can use the hook conditionally.

    function weplugins_modify_extra_theme_headers_conditional() {
        if (is_admin()) {
            // Modify header only for admin pages
            return array('Custom-Header');
        }
        return array();
    }
    // add the filter
    add_filter("extra_theme_headers", "weplugins_modify_extra_theme_headers_conditional");
    

Contact Us

If you need any customization or are having trouble using this hook, please Contact Us and we’d be happy to assist you.