1<?php
  2/**
  3 * Block visibility block support flag.
  4 *
  5 * @package WordPress
  6 * @since 6.9.0
  7 */
  8
  9/**
 10 * Render nothing if the block is hidden.
 11 *
 12 * @since 6.9.0
 13 * @access private
 14 *
 15 * @param string $block_content Rendered block content.
 16 * @param array  $block         Block object.
 17 * @return string Filtered block content.
 18 */
 19function wp_render_block_visibility_support( $block_content, $block ) {
 20	$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
 21
 22	if ( ! $block_type || ! block_has_support( $block_type, 'visibility', true ) ) {
 23		return $block_content;
 24	}
 25
 26	if ( isset( $block['attrs']['metadata']['blockVisibility'] ) && false === $block['attrs']['metadata']['blockVisibility'] ) {
 27		return '';
 28	}
 29
 30	return $block_content;
 31}
 32
 33add_filter( 'render_block', 'wp_render_block_visibility_support', 10, 2 );
 34