more fixing on the cronjob part

lib/functions/validate/function.validateSqlInterval.php

@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * This file is part of the Froxlor project.
+ * Copyright (c) 2010 the Froxlor Team (see authors).
+ *
+ * For the full copyright and license information, please view the COPYING
+ * file that was distributed with this source code. You can also view the
+ * COPYING file online at http://files.froxlor.org/misc/COPYING.txt
+ *
+ * @copyright  (c) the authors
+ * @author     Froxlor team <team@froxlor.org> (2010-)
+ * @license    GPLv2 http://files.froxlor.org/misc/COPYING.txt
+ * @package    Functions
+ * @version    $Id: $
+ */
+
+function validateSqlInterval($interval = null)
+{
+	if(!$interval === null || $interval != '')
+	{
+		if(strstr($interval, ' ') !== false)
+		{
+			/*
+			 * [0] = ([0-9]+)
+			 * [1] = valid SQL-Interval expression 
+			 */
+			$valid_expr = array(
+								'SECOND',
+								'MINUTE',
+								'HOUR',
+								'DAY',
+								'WEEK',
+								'MONTH',
+								'YEAR'
+						);
+			
+			$interval_parts = explode(' ', $interval);
+			
+			if(is_array($interval_parts)
+			&& isset($interval_parts[0])
+			&& isset($interval_parts[1]))
+			{
+				if(preg_match('/([0-9]+)/i', $interval_parts[0]))
+				{
+					if(in_array(strtoupper($interval_parts[1]), $valid_expr))
+					{
+						return true;
+					}
+				}
+			}
+		}
+	}
+	return false;
+}