Edit tag cloud widget number

By default, the WordPress tag cloud widget has a set amount of 45 tags to display. This can be seen in the wp-includes/category-template.php file.

By default, the WooCommerce plugin which I have installed, and it’s products tag cloud widget also resembles this.

How do I modify this amount from within my wp-content/themes/functions.php file, to display for example, only 15 product tags?

Here is what I have so far, but it is not working.

function custom_tag_cloud_widget($args) {
    $args['smallest'] = 8; //smallest tag
    $args['largest'] = 22; //largest tag
    $args['number'] = 15; //adding a 0 will display all tags
    $args['unit'] = 'pt'; //tag font unit
    return $args;
}

add_filter( 'widget_tag_cloud_args', 'custom_tag_cloud_widget' );

When changing the number within the core wp-includes.php/category-template.php file to 15 however, it does work.

Obviously, I don’t wish to edit any core files and am looking for an alternative solution.

Thanks.

Add the following to your theme’s function.php. Default values are shown below, except changing ‘number’ from 45 to 15. Only the changed values need to be included, so you can either leave the default values or remove/comment out those lines.

For WordPress Tag Cloud widget:

function custom_tag_cloud_widget() {
    $args = array(
        'smallest' => 8, 
        'largest' => 22, 
        'unit' => 'pt', 
        'number' => 15,
        'format' => 'flat', 
        'separator' => "\n", 
        'orderby' => 'name', 
        'order' => 'ASC',
        'exclude' => '', 
        'include' => '', 
        'link' => 'view', 
        'taxonomy' => 'post_tag', 
        'post_type' => '', 
        'echo' => true
    );
    return $args;
}
add_filter( 'widget_tag_cloud_args', 'custom_tag_cloud_widget' );

For WooCommerce Product Tags widget:

function custom_woocommerce_tag_cloud_widget() {
    $args = array(
        'number' => 15,
        'taxonomy' => 'product_tag'
    );
    return $args;
}
add_filter( 'woocommerce_product_tag_cloud_widget_args', 'custom_woocommerce_tag_cloud_widget' );