Form Validation - In Method
Returns true if a given value matches any of the specified list
diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index b640f1e..f3c8826 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -1438,6 +1438,22 @@
// --------------------------------------------------------------------
/**
+ * Value should be within an array of values
+ *
+ * @param string
+ * @param array
+ * @return bool
+ */
+ public function in($value, $list)
+ {
+ $list = array_map('trim', explode(',', (string) $list));
+
+ return in_array((string) $value, $list);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
* Is a Natural number (0,1,2,3, etc.)
*
* @param string