allow . in input name

framework/helpers/BaseHtml.php

@@ -1732,7 +1732,7 @@ class BaseHtml
      */
     public static function getAttributeName($attribute)
     {
-        if (preg_match('/(^|.*\])(\w+)(\[.*|$)/', $attribute, $matches)) {
+        if (preg_match('/(^|.*\])([\w\.]+)(\[.*|$)/', $attribute, $matches)) {
             return $matches[2];
         } else {
             throw new InvalidParamException('Attribute name must contain word characters only.');
@@ -1755,7 +1755,7 @@ class BaseHtml
      */
     public static function getAttributeValue($model, $attribute)
     {
-        if (!preg_match('/(^|.*\])(\w+)(\[.*|$)/', $attribute, $matches)) {
+        if (!preg_match('/(^|.*\])([\w\.]+)(\[.*|$)/', $attribute, $matches)) {
             throw new InvalidParamException('Attribute name must contain word characters only.');
         }
         $attribute = $matches[2];
@@ -1805,7 +1805,7 @@ class BaseHtml
     public static function getInputName($model, $attribute)
     {
         $formName = $model->formName();
-        if (!preg_match('/(^|.*\])(\w+)(\[.*|$)/', $attribute, $matches)) {
+        if (!preg_match('/(^|.*\])([\w\.]+)(\[.*|$)/', $attribute, $matches)) {
             throw new InvalidParamException('Attribute name must contain word characters only.');
         }
         $prefix = $matches[1];