This article will tell you how to hide a part of an article from anonymous visitors and show it for registered users only. We will do this in a few different methods.

Solutions:

• Using snippet
• Filtering of a special tag in theme template
• Using hidden_text module-filter
• Using Hidden Content module (http://drupal.org/project/hidden_content)
• Using Contemplate module (http://drupal.org/project/contemplate)

Using snippet

• Set format of article output to РНР
• Insert a code (snippet):
  

  <?php
  global $user;
  if (is_object($user) and $user->uid>0) {
  ?>
  Registered users only will see this
  <?php
  } else {
  ?>
  <a href=”http://example.com/user”>Get introduced</a> or <a href=”http://example.com/user/register”>Get registered</a>, to read hidden text.
  <?php
  }
  ?>

Filtering of a special tag in theme template

Include hidden text in a node to a special tag.
Get node text in template:

$node=node_load($nid);.
$node=node_prepare($node); //will allow you to generate the filtered content.

Filter a special tag with the help of regular expressions and output different text depending on a user (registered or not).

Using hidden_text module-filter

hidden text filter hides content from anonymous user.  Input format will be non-cached with the filter.

When you include the text between tags [hidden=Text] and [/hidden], it will be visible for registered users only.

If “Text” attribute is set, then specified text “Text” will be shown. Besides, a record of this kind: [hidden title=Text] is allowable for tag [hidden].

Example::

[hidden title=Sign up to view the hidden text]
…
Hidden text
…
[/hidden]

You can enter a link to registration page for a title.

Themization

• “title” will be included to span tags with “hidden-text hidded” class
• “Text” will be included to span tags with “hidden-text” class

Using Hidden Content module

You can use Hidden Content module (http://drupal.org/project/hidden_content) to hide a part of an article from unregistered users. You can learn more about it on the Drupal’s official site.