From d6b0649f9815e9aefe1f2b6cd3b93dcca53cda80 Mon Sep 17 00:00:00 2001
From: Rick Ellis <rick.ellis@ellislab.com>
Date: Wed, 20 Aug 2008 22:07:30 +0000
Subject: Added two new functions:  is_natural and is_natural_no_zero

---
 system/libraries/Validation.php | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/system/libraries/Validation.php b/system/libraries/Validation.php
index f5e4d2223..a0423c7b6 100644
--- a/system/libraries/Validation.php
+++ b/system/libraries/Validation.php
@@ -614,7 +614,35 @@ class CI_Validation {
 	{
 		return (bool)preg_match( '/^[\-+]?[0-9]+$/', $str);
 	}
-	
+
+	// --------------------------------------------------------------------
+
+    /**
+     * Is a Natural number  (0,1,2,3, etc.)
+     *
+     * @access	public
+     * @param	string
+     * @return	bool
+     */
+    function is_natural($str)
+    {   
+   		return (bool)preg_match( '/^[0-9]+$/', $str);
+    }
+
+	// --------------------------------------------------------------------
+
+    /**
+     * Is a Natural number, but not a zero  (1,2,3, etc.)
+     *
+     * @access	public
+     * @param	string
+     * @return	bool
+     */
+	function is_natural_no_zero($str)
+    {   
+   		return (bool)preg_match( '/^[1-9]+$/', $str);
+    }
+
 	// --------------------------------------------------------------------
 	
 	/**
-- 
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