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-rw-r--r--system/libraries/Form_validation.php25
1 files changed, 25 insertions, 0 deletions
diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index 6f654deb4..11f98f2a9 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -1284,6 +1284,31 @@ class CI_Form_validation {
// --------------------------------------------------------------------
/**
+ * Validate MAC address
+ *
+ * @param string $mac
+ * @return bool
+ */
+ public function valid_mac($mac)
+ {
+ if ( ! is_php('5.5'))
+ {
+ // Most common format, with either dash or colon delimiters
+ if (preg_match('#\A[0-9a-f]{2}(?<delimiter>[:-])([0-9a-f]{2}((?P=delimiter)|\z)){5}#i', $mac))
+ {
+ return TRUE;
+ }
+
+ // The less common format; e.g. 0123.4567.89ab
+ return (bool) preg_match('#((\A|\.)[0-9a-f]{4}){3}\z#i', $mac);
+ }
+
+ return (bool) filter_var($mac, FILTER_VALIDATE_MAC);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
* Alpha
*
* @param string