parent_post_rel_link

apply_filters('parent_post_rel_link') is found 1 times:

• /wp-includes/deprecated.php line 2788

  	$link = "<link rel='up' title='";
  	$link .= esc_attr( $title );
  	$link .= "' href='" . get_permalink($post) . "' />\n";
  
  	return apply_filters( "parent_post_rel_link", $link );
  }
  
  /**
   * Display relational link for parent item
   *
   * @since 2.8.0
  

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