Getting a custom field value outside the query loop

Hi there,

In your first code, try to swap the position of these 2 lines, and add the “Days” after the block content.

 $block_content .= $tour_length; 
 $block_content = str_replace('TOUR DATE', $event_date_format, $block_content);

So change it to:

 
$block_content = str_replace('TOUR DATE', $event_date_format, $block_content); 
$block_content .= '-'.$tour_length.' Days';

The code isn’t the one I was mentioning, I mean modify your 1st PHP code in this topic.

This:

add_filter( 'render_block', function( $block_content, $block ) {
    if ( ! empty( $block['attrs']['className'] ) && 'format-tour-date' === $block['attrs']['className'] ) { 
        $event_date_data = get_post_meta( get_the_id(), 'tour-start-date', true ); 
        $event_date_format = ! empty( $event_date_data ) ? date_i18n( 'F j, Y', strtotime( $event_date_data ) ) : '';

        $tour_length = get_post_meta( get_the_id(), 'tour-length', true );
        var_dump($tour_length);
        
      

        $block_content = str_replace('TOUR DATE', $event_date_format, $block_content); 
        $block_content .= '-'.$tour_length.' Days';
    }
    return $block_content;
}, 10, 2 );

And I saw another render_block filter in your child theme is targeting the same format-tour-date class, to avoid conflicting, you should only be using only one render_block filter for one block.

Hi there,

render_block is a core function of WordPress that has its own filter hook:

https://developer.wordpress.org/reference/hooks/render_block/

It exists in all well coded blocks, and simply allows you to filter the front end rendered content of any block. It doesn’t do anything smart or connect things. So you need some code that retrieves related field data to which you can return that result inside the render_block callback

Here is a commented PHP Snippet that explains how to return a related posts custom field inside it:

function custom_render_related_event_block($block_content, $block) {
    // abort if in admin
    if (is_admin() || wp_is_json_request()) {
        return $block_content; 
    }
    // find block with a class of <code>your-custom-class</code>
    if ( ! empty( $block['attrs']['className'] ) && 'your-custom-class' === $block['attrs']['className'] )  {
        // Get the current event's ID
        $event_id = get_the_ID();
        
        // Get the related tours (assuming 'tours' is the name of the ACF relationship field)
        $related_tours = get_field('tours', $event_id);

        // Initialize output variable
        $related_content_output = '';

        // Loop through related tours to get their related-content field
        if ($related_tours) {
            foreach ($related_tours as $tour) {
                // Assuming 'related-content' is the name of the field in the tour post type
                $related_content = get_field('related-content', $tour->ID);
                
                if ($related_content) {
                    $related_content_output .= '<div class="related-content">' . esc_html($related_content) . '</div>';
                }
            }
        }
        // if there is realted content; return it.
        if ($related_content) {
            return $related_content_output;
        }
    }

    return $block_content;
}

// Hook into the 'render_block' filter
add_filter('render_block', 'custom_render_related_event_block', 10, 2);