Index: branches/RC/core/kernel/nparser/ntags.php
===================================================================
diff -u -r11892 -r11934
--- branches/RC/core/kernel/nparser/ntags.php	(.../ntags.php)	(revision 11892)
+++ branches/RC/core/kernel/nparser/ntags.php	(.../ntags.php)	(revision 11934)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: ntags.php 11892 2009-07-01 08:35:06Z alex $
+* @version	$Id: ntags.php 11934 2009-07-19 13:23:16Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -572,3 +572,30 @@
 	}
 
 }
+
+class _Tag_IfDataExists extends _BlockTag {
+
+	function Open($tag)
+	{
+		$o = '';
+		$code = array();
+		$code[] = "ob_start();\n";
+		$code[] = '$_tmp_data_exists = $_parser->DataExists;';
+		$code[] = '$_parser->DataExists = false;';
+		$this->AppendCode($o, $code);
+		return $o;
+	}
+
+	function Close($tag)
+	{
+		$o = $this->Parser->Buffers[$this->Parser->Level];
+		$code = array();
+		$code[] = '$res = ob_get_clean();';
+		$code[] = 'if ($_parser->DataExists) {echo $res;}';
+		$code[] = '$_parser->DataExists = $_tmp_data_exists;';
+
+		$this->AppendCode($o, $code);
+		return $o;
+	}
+
+}
\ No newline at end of file