Form Validation - In Method
diff --git a/system/language/english/form_validation_lang.php b/system/language/english/form_validation_lang.php
index e5ef09e..a66e192 100644
--- a/system/language/english/form_validation_lang.php
+++ b/system/language/english/form_validation_lang.php
@@ -65,3 +65,4 @@
$lang['form_validation_greater_than'] = 'The {field} field must contain a number greater than {param}.';
$lang['form_validation_greater_than_equal_to'] = 'The {field} field must contain a number greater than or equal to {param}.';
$lang['form_validation_error_message_not_set'] = 'Unable to access an error message corresponding to your field name {field}.';
+$lang['form_validation_in'] = 'The {field} field must be one of: {param}.';
diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php
index 8192245..e81216e 100644
--- a/system/libraries/Form_validation.php
+++ b/system/libraries/Form_validation.php
@@ -1449,6 +1449,20 @@
// --------------------------------------------------------------------
/**
+ * Value should be within an array of values
+ *
+ * @param string
+ * @param array
+ * @return bool
+ */
+ public function in($value, $list)
+ {
+ return in_array($value, explode(',', $list), TRUE);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
* Is a Natural number (0,1,2,3, etc.)
*
* @param string