#24023 by chx. Allow multiple select options with the same value and implement...

#24023 by chx. Allow multiple select options with the same value and implement it for taxonomy selection.

includes/form.inc

@@ -890,6 +890,9 @@ function form_select_options($element, $choices = NULL) {
       $options .= form_select_options($element, $choice);
       $options .= '</optgroup>';
     }
+    elseif (is_object($choice)) {
+      $options .= form_select_options($element, $choice->option);
+    }
     else {
       $key = (string)$key;
       if ($value_valid && ($element['#value'] == $key || ($value_is_array && in_array($key, $element['#value'])))) {

modules/taxonomy/taxonomy.module

@@ -1101,7 +1101,9 @@ function _taxonomy_term_select($title, $name, $value, $vocabulary_id, $descripti
   if ($tree) {
     foreach ($tree as $term) {
       if (!in_array($term->tid, $exclude)) {
-        $options[$term->tid] = str_repeat('-', $term->depth) . $term->name;
+        $choice = new stdClass();
+        $choice->option = array($term->tid => str_repeat('-', $term->depth) . $term->name);
+        $options[] = $choice;
       }
     }
     if (!$blank && !$value) {