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apply_filters( 'block_categories', array[] $default_categories, WP_Post $post )

Filter the default array of block categories.

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Parameters
Related
- Used By
Source
Changelog
User Contributed Notes

Parameters Parameters

$default_categories: (array[]) Array of block categories.
$post: (WP_Post) Post being loaded.

Used By Used By

Used By
Used By	Description
wp-admin/includes/post.php: get_block_categories()	Returns all the block categories that will be shown in the block editor.

Source Source

File: wp-admin/includes/post.php

Changelog Changelog

Changelog
Version	Description
5.0.0	Introduced.

User Contributed Notes User Contributed Notes

1

Contributed by Mahdi Yazdani — 3 weeks ago

Register a new block category for “My Plugin” if it doesn’t exist already.

Note: You can also pass a second argument $post to generate a different category depending on the post’s content or type.

/**
 * Creating a new (custm) block category.
 *
 * @param   array $categories     List of block categories.
 * @return  array
 */
function wpdocs_new_block_category( $categories ) {
    // Plugin’s block category title and slug.
    $block_category = array( 'title' => esc_html__( 'My Plugin', 'text-domain' ), 'slug' => 'myplugin' );
    $category_slugs = wp_list_pluck( $categories, 'slug' );

    if ( ! in_array( $block_category['slug'], $category_slugs, true ) ) {
        $categories = array_merge(
            $categories,
            array(
                array(
                    'title' => $block_category['title'], // Required
                    'slug'  => $block_category['slug'], // Required
                    'icon'  => 'wordpress', // Slug of a WordPress Dashicon or custom SVG
                ),
            )
        );
    }

    return $categories;
}
add_filter( 'block_categories', 'wpdocs_new_block_category' );

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