From b2evolution manual

Display message if there are no any posts.

[edit] Example

<source lang="php"> <?php

  display_if_empty( array (

'before' => '

', 'after' => '

',

     'msg_empty' => 'Sorry, there is nothing to display...'
   ) );

?> </source>

[edit] Parameters

Name	Default	Usage
before	'<p class="msg_nothing">'	Displayed before message.
after	'</p>'	Displayed after message.
msg_empty	'Sorry, there is nothing to display...'	Default message text to display.

[edit] Return value

This function return false, if there are no any posts.
If there are some posts then this function return true and displays content.