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Adding block visibility code to show the Organic Groups Recent Members block on group node types
Eric.London's picture
Submitted by Eric.London on 4/7/2009
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The Organic Groups Views Integration module comes with a bunch of useful views related to groups and their members. I assigned the "Recent members" block view to a region of my theme, and the block appeared on all group nodes and nodes that belong to a group. For the Drupal site I was working on, it was desired to only appear on the group nodes (not the nodes that belong to groups). No worries, you can always add block visibility code to determine when to show the block.

I went to the blocks admin screen (admin/build/block) and clicked configure for this block. Scroll down to the fieldset titled "Page specific visibility settings". I choose the radio option "Show if the following PHP code returns TRUE (PHP-mode, experts only)." and added the following PHP snippet:

<?php
if (function_exists('_MYMODULE_block_visibility_og_members'))
  return _MYMODULE_block_visibility_og_members();
return false;
?>

Next, I added a function in my module to handle the request.

<?php
function _MYMODULE_block_visibility_og_members() {
  // lookup node id from query string
  $path = drupal_lookup_path('source', $_REQUEST['q']);

  // ensure the page is a node
  if (substr($path,0,5)=='node/') {
    // load node
    $node = node_load(substr($path,5));

    // check if node type is a group node
    return og_is_group_type($node->type);
  }
  return false;
}
?>

Now, the block only appears on group node types.

Showing a block conditionally based on the node type of the page
Eric.London's picture
Submitted by Eric.London on 1/27/2009
Tags:

I recently created a block view that I wanted to include only on pages of a certain node type. I decided to create a PHP function that returns true or false based based on the page URL and then call the function via the "Page specific visibility settings", on the block edit screen.

This function returns true or false based on the what type of node the page URL is. I added this function to my template.php file, but you could add it to a module if desired.

<?php
function _MYTHEME_MYBLOCK_visibility() {
  // look up the system path from the page URL
  $path = drupal_lookup_path('source', $_REQUEST['q']);

  // check if the page is a node
  if (substr($path,0,5)=='node/') {
    // load node
    $node = node_load(substr($path,5));
       
    // check if node exists
    if (!$node) return false;
       
    // check node type
    if ($node->type == 'MYNODETYPE') return true;
       
  } else {
    return false;   
  }
}
?>

Then I added a PHP snippet in the "Page specific visibility settings" on the block edit screen:

<?php
if (function_exists('_MYTHEME_MYBLOCK_visibility')) return _MYTHEME_MYBLOCK_visibility();
return false;
?>

Now, the block only shows on pages of "MYNODETYPE".

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