render_block_core_comments( array $attributes, string $content, WP_Block $block ): string

28function render_block_core_comments( $attributes, $content, $block ) {29	global $post;30 31	if ( ! isset( $block->context['postId'] ) ) {32		return '';33	}34 35	$post_id = $block->context['postId'];36	// Return early if there are no comments and comments are closed.37	if ( ! comments_open( $post_id ) && (int) get_comments_number( $post_id ) === 0 ) {38		return '';39	}40 41	// If this isn't the legacy block, we need to render the static version of this block.42	$is_legacy = 'core/post-comments' === $block->name || ! empty( $attributes['legacy'] );43	if ( ! $is_legacy ) {44		return $block->render( array( 'dynamic' => false ) );45	}46 47	$post_before = $post;48	$post        = get_post( $post_id );49	setup_postdata( $post );50 51	ob_start();52 53	/*54	 * There's a deprecation warning generated by WP Core.55	 * Ideally this deprecation is removed from Core.56	 * In the meantime, this removes it from the output.57	 */58	add_filter( 'deprecated_file_trigger_error', '__return_false' );59	comments_template();60	remove_filter( 'deprecated_file_trigger_error', '__return_false' );61 62	$output = ob_get_clean();63	$post   = $post_before;64 65	$classnames = array();66	// Adds the old class name for styles' backwards compatibility.67	if ( isset( $attributes['legacy'] ) ) {68		$classnames[] = 'wp-block-post-comments';69	}70	if ( isset( $attributes['textAlign'] ) ) {71		$classnames[] = 'has-text-align-' . $attributes['textAlign'];72	}73 74	$wrapper_attributes = get_block_wrapper_attributes(75		array( 'class' => implode( ' ', $classnames ) )76	);77 78	/*79	 * Enqueues scripts and styles required only for the legacy version. That is80	 * why they are not defined in `block.json`.81	 */82	wp_enqueue_script( 'comment-reply' );83	enqueue_legacy_post_comments_block_styles( $block->name );84 85	return sprintf( '<div %1$s>%2$s</div>', $wrapper_attributes, $output );86}