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   1  <?php
   2  /**
   3   * Server-side rendering of the `core/post-content` block.
   4   *
   5   * @package WordPress
   6   */
   7  
   8  /**
   9   * Renders the `core/post-content` block on the server.
  10   *
  11   * @param array    $attributes Block attributes.
  12   * @param string   $content    Block default content.
  13   * @param WP_Block $block      Block instance.
  14   * @return string Returns the filtered post content of the current post.
  15   */
  16  function render_block_core_post_content( $attributes, $content, $block ) {
  17      static $seen_ids = array();
  18  
  19      if ( ! isset( $block->context['postId'] ) ) {
  20          return '';
  21      }
  22  
  23      $post_id = $block->context['postId'];
  24  
  25      if ( isset( $seen_ids[ $post_id ] ) ) {
  26          // WP_DEBUG_DISPLAY must only be honored when WP_DEBUG. This precedent
  27          // is set in `wp_debug_mode()`.
  28          $is_debug = WP_DEBUG && WP_DEBUG_DISPLAY;
  29  
  30          return $is_debug ?
  31              // translators: Visible only in the front end, this warning takes the place of a faulty block.
  32              __( '[block rendering halted]' ) :
  33              '';
  34      }
  35  
  36      $seen_ids[ $post_id ] = true;
  37  
  38      // When inside the main loop, we want to use queried object
  39      // so that `the_preview` for the current post can apply.
  40      // We force this behavior by omitting the third argument (post ID) from the `get_the_content`.
  41      $content = get_the_content();
  42      // Check for nextpage to display page links for paginated posts.
  43      if ( has_block( 'core/nextpage' ) ) {
  44          $content .= wp_link_pages( array( 'echo' => 0 ) );
  45      }
  46  
  47      /** This filter is documented in wp-includes/post-template.php */
  48      $content = apply_filters( 'the_content', str_replace( ']]>', ']]&gt;', $content ) );
  49      unset( $seen_ids[ $post_id ] );
  50  
  51      if ( empty( $content ) ) {
  52          return '';
  53      }
  54  
  55      $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => 'entry-content' ) );
  56  
  57      return (
  58          '<div ' . $wrapper_attributes . '>' .
  59              $content .
  60          '</div>'
  61      );
  62  }
  63  
  64  /**
  65   * Registers the `core/post-content` block on the server.
  66   */
  67  function register_block_core_post_content() {
  68      register_block_type_from_metadata(
  69          __DIR__ . '/post-content',
  70          array(
  71              'render_callback' => 'render_block_core_post_content',
  72          )
  73      );
  74  }
  75  add_action( 'init', 'register_block_core_post_content' );