diff --git a/main/inc/lib/array.lib.php b/main/inc/lib/array.lib.php
new file mode 100644
index 0000000000..519ac831d2
--- /dev/null
+++ b/main/inc/lib/array.lib.php
@@ -0,0 +1,41 @@
+<?php 
+/* For licensing terms, see /dokeos_license.txt */
+/**
+==============================================================================
+*	This is the array library for Dokeos.
+*	Include/require it in your code to use its functionality.
+*
+*	@package dokeos.library
+==============================================================================
+*/
+
+/*
+==============================================================================
+		FUNCTIONS
+==============================================================================
+*/
+
+
+/**
+ * Removes duplicate values from a dimensional array
+ * 
+ * @param array a dimensional array 
+ * @return array an array with unique values 
+ */
+function array_unique_dimensional($array)
+{
+    if(!is_array($array))
+		return $array;
+
+    foreach ($array as &$myvalue){
+        $myvalue=serialize($myvalue);
+    }
+	
+    $array=array_unique($array);
+
+    foreach ($array as &$myvalue){
+        $myvalue=unserialize($myvalue);
+    }
+    return $array;
+}
+?>
\ No newline at end of file