Fixes #15791: Added a warning when the form names conflict

framework/CHANGELOG.md

@@ -4,6 +4,7 @@ Yii Framework 2 Change Log
 2.0.16 under development
 ------------------------
 
+- Bug #15791: Added a warning when the form names conflict (s1lver, rustamwin)
 - Enh #16151: `ActiveQuery::getTableNameAndAlias()` is now protected (s1lver)
 - Bug #16657: Ensure widgets after run event result contains the result of the rendered widget (AdeAttwood)
 - Bug #14230: Fixed `itemsOptions` ignored in `checkBoxList` (s1lver)

framework/assets/yii.js

@@ -160,7 +160,18 @@ window.yii = (function ($) {
                 pjax = $e.data('pjax'),
                 usePjax = pjax !== undefined && pjax !== 0 && $.support.pjax,
                 pjaxContainer,
-                pjaxOptions = {};
+                pjaxOptions = {},
+                conflictParams = ['submit', 'reset', 'elements', 'length', 'name', 'acceptCharset',
+                    'action', 'enctype', 'method', 'target'];
+
+            // Forms and their child elements should not use input names or ids that conflict with properties of a form,
+            // such as submit, length, or method.
+            $.each(conflictParams, function (index, param) {
+                if (areValidParams && params.hasOwnProperty(param)) {
+                    console.error("Parameter name '" + param + "' conflicts with a same named form property. " +
+                        "Please use another name.");
+                }
+            });
 
             if (usePjax) {
                 pjaxContainer = $e.data('pjax-container');