Meta box definition

README

The first is my definition. As you can note, there is a 'templates' argument. The problem was there before I added this.

I added what I changed to the inc/classes/meta-box.php to make the metabox definition check for the template used. It is very useful to have metabox on some pages only.

function.php

$meta_boxes[] = array(

  // Meta box title - Will appear at the drag and drop handle bar. Required.
  'title' => 'Sidebar',

  // Post types, accept custom post types as well - DEFAULT is array('post'). Optional.
  'pages' => array( 'page' ),

  // Post types, accept custom post types as well - DEFAULT is array('post'). Optional.
  'templates' => array( 'page-sidebar.php' ),

  // Where the meta box appear: normal (default), advanced, side. Optional.
  'context' => 'normal',

  // Order of meta box: high (default), low. Optional.
  'priority' => 'high',

  // List of meta fields
  'fields' => array(
    array(
      'name' => 'Sidebar',
      'id'   => "sidebar",
      'type' => 'wysiwyg',
      'std'  => '',

      // Editor settings, see wp_editor() function: look4wp.com/wp_editor
      'options' => array(
        'textarea_rows' => 4,
        'teeny'         => true,
        'media_buttons' => false,
      ),
    ),
  )
);

meta-box.php

// on line 59

// Only on the specified templates
$post_id = $_GET['post'] ? $_GET['post'] : $_POST['post_ID'] ;
$template_file = get_post_meta($post_id,'_wp_page_template',TRUE);
if(isset($this->meta_box['templates']) && !in_array($template_file, $this->meta_box['templates'])) return;