# Use ACF Fields in Core Blocks With Block Bindings

> Registers an "ACF field" block bindings source, so paragraph, heading, button and image blocks can show ACF values without a custom block (WordPress 6.5+).

- Type: PHP
- Runs: Run everywhere
- Category: [Custom Post Types & Fields](https://wpide.com/library/category/post-types/)
- Tags: acf, block-bindings, gutenberg
- Author: WPIDE Team
- Installs: 0
- Updated: 2026-10-28
- Page: https://wpide.com/library/acf-block-bindings-source/

## Code

```php
add_action( 'init', function () {
    if ( ! function_exists( 'register_block_bindings_source' ) ) {
        return;
    }

    register_block_bindings_source( 'wpide/acf', array(
        'label'              => 'ACF field',
        'uses_context'       => array( 'postId', 'postType' ),
        'get_value_callback' => function ( $source_args, $block_instance, $attribute_name ) {
            $key     = isset( $source_args['key'] ) ? sanitize_key( $source_args['key'] ) : '';
            $post_id = isset( $block_instance->context['postId'] ) ? (int) $block_instance->context['postId'] : get_the_ID();

            if ( '' === $key || '_' === $key[0] || ! $post_id || ! function_exists( 'get_field' ) || ( ! is_post_publicly_viewable( $post_id ) && ! current_user_can( 'read_post', $post_id ) ) ) {
                return null;
            }

            $value = get_field( $key, $post_id );

            if ( is_array( $value ) ) {
                $value = $value['url'] ?? ( $value['label'] ?? '' );
            }

            if ( ! is_scalar( $value ) ) {
                return null;
            }

            return in_array( $attribute_name, array( 'url', 'href' ), true ) ? esc_url( (string) $value ) : esc_html( (string) $value );
        },
    ) );
} );
```

## Notes

Bind in the Code editor, e.g. "metadata":{"bindings":{"content":{"source":"wpide/acf","args":{"key":"subtitle"}}}}. Fields starting with an underscore are never exposed.

## How to use it

Install the free WPIDE plugin (https://wordpress.org/plugins/wpide/), find "Use ACF Fields in Core Blocks With Block Bindings" in its snippet library and add it in one click; or create a new PHP snippet in WPIDE (or any code snippets plugin) and paste the code above. More snippets: https://wpide.com/library/