1 <?php

     2 /**

     3  * Server-side rendering of the `core/block` block.

     4  *

     5  * @package WordPress

     6  */

     7 

     8 /**

     9  * Renders the `core/block` block on server.

    10  *

    11  * @param array $attributes The block attributes.

    12  *

    13  * @return string Rendered HTML of the referenced block.

    14  */

    15 function render_block_core_block( $attributes ) {

    16 	if ( empty( $attributes['ref'] ) ) {

    17 		return '';

    18 	}

    19 

    20 	$reusable_block = get_post( $attributes['ref'] );

    21 	if ( ! $reusable_block || 'wp_block' !== $reusable_block->post_type ) {

    22 		return '';

    23 	}

    24 

    25 	if ( 'publish' !== $reusable_block->post_status || ! empty( $reusable_block->post_password ) ) {

    26 		return '';

    27 	}

    28 

    29 	return do_blocks( $reusable_block->post_content );

    30 }

    31 

    32 register_block_type(

    33 	'core/block',

    34 	array(

    35 		'attributes'      => array(

    36 			'ref' => array(

    37 				'type' => 'number',

    38 			),

    39 		),

    40 

    41 		'render_callback' => 'render_block_core_block',

    42 	)

    43 );