How to use mce_buttons_4 filter in WordPress

mce_buttons_4 filter

Filters the fourth-row list of TinyMCE buttons (Visual tab).

To use mce_buttons_4 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.

We at WePlugins 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 modify_mce_buttons_4_defaults which takes 2 parameters and we registered using add_filter. The first parameter mce_buttons_4 is the name of the hook, The second parameter modify_mce_buttons_4_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.

Sometime, you have to remove a registered hook so you can use remove_filter to remove mce_buttons_4 filter.

Parameters

Below are the 2 parameters required to use this hook.

• $mce_buttons_4 : (array) Fourth-row list of buttons.
• $editor_id : (string) Unique editor identifier, e.g. ‘content’. Accepts ‘classic-block’ when called from block editor’s Classic block.

Live Example

apply_filters( 'mce_buttons_4', array $mce_buttons_4, string $editor_id )

Below is an example how you can use this hook.

    function weplugins_modify_mce_buttons_4_defaults($mce_buttons_4, $editor_id) { 
        // Update the $mce_buttons_4 variable according to your website requirements and return this variable. You can modify the $mce_buttons_4 variable conditionally too if you want.
        return $mce_buttons_4; 
    }
    // add the filter
    add_filter( "mce_buttons_4", "weplugins_modify_mce_buttons_4_defaults", 10, 2 );
    

To remove a hook callback, use the example below.

remove_filter( "mce_buttons_4", "weplugins_modify_mce_buttons_4_defaults", 10, 2 );

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

Example 1: Adding a Custom Button

In this example, we add a custom button to the fourth row of the TinyMCE editor.

    function weplugins_add_custom_button($mce_buttons_4, $editor_id) {
        // Add a custom button
        $mce_buttons_4[] = 'custom_button';
        return $mce_buttons_4;
    }
    add_filter('mce_buttons_4', 'weplugins_add_custom_button', 10, 2);
    

Example 2: Removing a Specific Button

This example demonstrates how to remove a specific button from the fourth row of the TinyMCE editor.

    function weplugins_remove_specific_button($mce_buttons_4, $editor_id) {
        // Remove a specific button
        $key = array_search('specific_button', $mce_buttons_4);
        if($key !== false){
            unset($mce_buttons_4[$key]);
        }
        return $mce_buttons_4;
    }
    add_filter('mce_buttons_4', 'weplugins_remove_specific_button', 10, 2);
    

Example 3: Reordering Buttons

Here, we reorder the buttons in the fourth row of the TinyMCE editor.

    function weplugins_reorder_buttons($mce_buttons_4, $editor_id) {
        // Reorder buttons
        $mce_buttons_4 = array('bold', 'italic', 'underline', 'custom_button');
        return $mce_buttons_4;
    }
    add_filter('mce_buttons_4', 'weplugins_reorder_buttons', 10, 2);
    

Contact Us

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