this isn't java... you need to say $this-> and self:: explicitly

diff --git a/includes/IP.php b/includes/IP.php
index 599482c..b065a65 100644 (file)
--- a/includes/IP.php
+++ b/includes/IP.php
@@ -312,7 +312,7 @@ class IP {
        public static function toUnsigned( $ip ) {
                // Use IPv6 functions if needed
                if ( self::isIPv6( $ip ) ) {
-                       return toUnsigned6( $ip );
+                       return self::toUnsigned6( $ip );
                }
                if ( $ip == '255.255.255.255' ) {
                        $n = -1;