From 728115901ff93183f8f2f695417621cfc799a865 Mon Sep 17 00:00:00 2001
From: Andrey Andreev <narf@bofh.bg>
Date: Fri, 8 Jun 2012 00:01:10 +0300
Subject: Fixed valid_ip() for PHP < 5.2

---
 system/core/Input.php | 43 +++++++++++++++++++++----------------------
 1 file changed, 21 insertions(+), 22 deletions(-)

(limited to 'system')

diff --git a/system/core/Input.php b/system/core/Input.php
index 4b7622cbe..47fc0f887 100755
--- a/system/core/Input.php
+++ b/system/core/Input.php
@@ -389,11 +389,10 @@ class CI_Input {
 					break;
 			}
 
-			return filter_var($ip, FILTER_VALIDATE_IP, $flag) !== FALSE;
+			return (bool) filter_var($ip, FILTER_VALIDATE_IP, $flag);
 		}
-		
-		// If it's not we'll do it manually
-		if ($which != 'ipv6' OR $which != 'ipv4')
+
+		if ($which !== 'ipv6' && $which !== 'ipv4')
 		{
 			if (strpos($ip, ':') !== FALSE)
 			{
@@ -405,16 +404,16 @@ class CI_Input {
 			}
 			else
 			{
-				return FALSE;
+				return $this->_valid_ipv4($ip) OR $this->_valid_ipv6($ip);
 			}
 		}
-		
+
 		$func = '_valid_'.$which;
 		return $this->$func($ip);
 	}
-	
+
 	// --------------------------------------------------------------------
-	
+
 	/**
 	* Validate IPv4 Address
 	*
@@ -429,7 +428,7 @@ class CI_Input {
 		$ip_segments = explode('.', $ip);
 
 		// Always 4 segments needed
-		if (count($ip_segments) != 4)
+		if (count($ip_segments) !== 4)
 		{
 			return FALSE;
 		}
@@ -438,7 +437,7 @@ class CI_Input {
 		{
 			return FALSE;
 		}
-		
+
 		// Check each segment
 		foreach ($ip_segments as $segment)
 		{
@@ -452,9 +451,9 @@ class CI_Input {
 
 		return TRUE;
 	}
-		
+
 	// --------------------------------------------------------------------
-	
+
 	/**
 	* Validate IPv6 Address
 	*
@@ -467,33 +466,33 @@ class CI_Input {
 		// 8 groups, separated by :
 		// 0-ffff per group
 		// one set of consecutive 0 groups can be collapsed to ::
-		
+
 		$groups = 8;
 		$collapsed = FALSE;
-		
+
 		$chunks = array_filter(
 			preg_split('/(:{1,2})/', $str, NULL, PREG_SPLIT_DELIM_CAPTURE)
 		);
-		
+
 		// Rule out easy nonsense
 		if (current($chunks) == ':' OR end($chunks) == ':')
 		{
 			return FALSE;
 		}
-		
+
 		// PHP supports IPv4-mapped IPv6 addresses, so we'll expect those as well
 		if (strpos(end($chunks), '.') !== FALSE)
 		{
 			$ipv4 = array_pop($chunks);
-			
+
 			if ( ! $this->_valid_ipv4($ipv4))
 			{
 				return FALSE;
 			}
-			
+
 			$groups--;
 		}
-		
+
 		while ($seg = array_pop($chunks))
 		{
 			if ($seg[0] == ':')
@@ -502,19 +501,19 @@ class CI_Input {
 				{
 					return FALSE;	// too many groups
 				}
-				
+
 				if (strlen($seg) > 2)
 				{
 					return FALSE;	// long separator
 				}
-				
+
 				if ($seg == '::')
 				{
 					if ($collapsed)
 					{
 						return FALSE;	// multiple collapsed
 					}
-					
+
 					$collapsed = TRUE;
 				}
 			}
-- 
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