Registering Basic ACF Block in Sage 9

[darthink]

Hello, I have a basic question for Sage 9, no Bedrock.

I’m trying to setup the normal, boring ACF Blocks, no custom plugins that I know some of you have. I’m using this guide.

The first thing I’ve done is add the following to my setup.php file:

function register_acf_block_types() {

    // register a testimonial block.
    acf_register_block_type(array(
        'name'              => 'testimonial',
        'title'             => __('Testimonial'),
        'description'       => __('A custom testimonial block.'),
        'render_template'   => 'app/Blocks/Testimonial/testimonial.php',
        'category'          => 'formatting',
        'icon'              => 'admin-comments',
        'keywords'          => array( 'testimonial', 'quote' ),
    ));
}

// Check if function exists and hook into setup.
if( function_exists('acf_register_block_type') ) {
    add_action('acf/init', 'register_acf_block_types');
}

I get the following error though:

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'register_acf_block_types' not found or invalid function name in /app/public/wp-includes/class-wp-hook.php on line 286

I feel this should be a very simple thing, but I’m not sure what’s going on. My Sage theme doesn’t seem to want to communicate very well with the main WordPress files or plugins. Any suggestions?

[alwaysblank]

If you look at the top of setup.php you’ll see

<?php

namespace App;

This means that setup.php is in the App namespace. Whenever you pass callbacks to add_action or add_filter or whatever you must include the namespace. You can write the whole thing out, but in this context the easiest way is to use the __NAMESPACE__ magic constant. So something like this:

if( function_exists('acf_register_block_type') ) {
    add_action('acf/init', __NAMESPACE__.'\\register_acf_block_types');
}

If you don’t anticipate needing to un-hook that action later, you can do what many of us do and pass an anonymous function as a callback instead:

if( function_exists('acf_register_block_type') ) {
    add_action('acf/init', function() {

      // register a testimonial block.
      acf_register_block_type(array(
        'name'              => 'testimonial',
        'title'             => __('Testimonial'),
        'description'       => __('A custom testimonial block.'),
        'render_template'   => 'app/Blocks/Testimonial/testimonial.php',
        'category'          => 'formatting',
        'icon'              => 'admin-comments',
        'keywords'          => array( 'testimonial', 'quote' ),
      ));
    });
}

[darthink]

OMG, you’re amazing @alwaysblank!! Thank you very much for the detailed explanation and response.