render_block example

// Skip the block if it has disallowed or nested inner blocks.                 foreach ( $block['innerBlocks'] as $inner_block ) {
                    if (
                        ! in_array( $inner_block['blockName'], $allowed_inner_blocks, true ) ||
                        ! empty( $inner_block['innerBlocks'] )
                    ) {
                        continue 2;
                    }
                }
            }

            $output .= render_block( $block );
        }
    }

    return $output;
}

/** * Parses footnotes markup out of a content string, * and renders those appropriate for the excerpt. * * @since 6.3.0 * * @param string $content The content to parse. * @return string The parsed and filtered content. */

        if ( '*' === $block_name[-1] ) {
            $is_matching_block = 0 === strpos( $block['blockName'], rtrim( $block_name, '*' ) );
        } else {
            $is_matching_block = $block_name === $block['blockName'];
        }

        if ( $is_matching_block ) {
            // Increment count.             $instances_count++;

            // Add the block HTML.             $blocks_content .= render_block( $block );

            // Break the loop if the $instances count was reached.             if ( $instances_count >= $instances ) {
                break;
            }
        }
    }

    if ( $blocks_content ) {
        /** This filter is documented in wp-includes/post-template.php */
        echo apply_filters( 'the_content', $blocks_content ); // phpcs:ignore WordPress.Security.EscapeOutput

// Create an array representation simulating the output of parse_blocks.         $block = array(
            'blockName'    => $request['name'],
            'attrs'        => $attributes,
            'innerHTML'    => '',
            'innerContent' => array(),
        );

        // Render using render_block to ensure all relevant filters are used.         $data = array(
            'rendered' => render_block( $block ),
        );

        return rest_ensure_response( $data );
    }

    /** * Retrieves block's output schema, conforming to JSON Schema. * * @since 5.0.0 * * @return array Item schema data. */