Handle empty sets correctly

diff --git a/includes/api/ApiBase.php b/includes/api/ApiBase.php
index 5551b01..cc88e97 100644 (file)
--- a/includes/api/ApiBase.php
+++ b/includes/api/ApiBase.php
@@ -503,6 +503,8 @@ abstract class ApiBase {
        * @return (allowMultiple ? an_array_of_values : a_single_value) 
        */
        protected function parseMultiValue($valueName, $value, $allowMultiple, $allowedValues) {
+               if( !trim( $value ) )
+                       return array();
                $valuesList = explode('|', $value);
                if (!$allowMultiple && count($valuesList) != 1) {
                        $possibleValues = is_array($allowedValues) ? "of '" . implode("', '", $allowedValues) . "'" : '';