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block.php (1508B)

      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 	static $seen_refs = array();
     17 
     18 	if ( empty( $attributes['ref'] ) ) {
     19 		return '';
     20 	}
     21 
     22 	$reusable_block = get_post( $attributes['ref'] );
     23 	if ( ! $reusable_block || 'wp_block' !== $reusable_block->post_type ) {
     24 		return '';
     25 	}
     26 
     27 	if ( isset( $seen_refs[ $attributes['ref'] ] ) ) {
     28 		// WP_DEBUG_DISPLAY must only be honored when WP_DEBUG. This precedent
     29 		// is set in `wp_debug_mode()`.
     30 		$is_debug = defined( 'WP_DEBUG' ) && WP_DEBUG &&
     31 			defined( 'WP_DEBUG_DISPLAY' ) && WP_DEBUG_DISPLAY;
     32 
     33 		return $is_debug ?
     34 			// translators: Visible only in the front end, this warning takes the place of a faulty block.
     35 			__( '[block rendering halted]' ) :
     36 			'';
     37 	}
     38 
     39 	if ( 'publish' !== $reusable_block->post_status || ! empty( $reusable_block->post_password ) ) {
     40 		return '';
     41 	}
     42 
     43 	$seen_refs[ $attributes['ref'] ] = true;
     44 
     45 	$result = do_blocks( $reusable_block->post_content );
     46 	unset( $seen_refs[ $attributes['ref'] ] );
     47 	return $result;
     48 }
     49 
     50 /**
     51  * Registers the `core/block` block.
     52  */
     53 function register_block_core_block() {
     54 	register_block_type_from_metadata(
     55 		__DIR__ . '/block',
     56 		array(
     57 			'render_callback' => 'render_block_core_block',
     58 		)
     59 	);
     60 }
     61 add_action( 'init', 'register_block_core_block' );