Widget IDs are now always unique no matter if it's the same request or new one

framework/CHANGELOG.md

@@ -12,6 +12,7 @@ Yii Framework 2 Change Log
 - Enh #1437: Added ListView::viewParams (qiangxue)
 - Enh #1469: ActiveRecord::find() now works with default conditions (default scope) applied by createQuery (cebe)
 - Enh: Added `favicon.ico` and `robots.txt` to defauly application templates (samdark)
+- Enh: Widget IDs are now always unique no matter if it's the same request or new one (samdark)
 - New #1438: [MongoDB integration](https://github.com/yiisoft/yii2-mongodb) ActiveRecord and Query (klimov-paul)
 
 2.0.0 alpha, December 1, 2013

framework/yii/base/Widget.php

@@ -25,11 +25,6 @@ use ReflectionClass;
 class Widget extends Component implements ViewContextInterface
 {
 	/**
-	 * @var integer a counter used to generate [[id]] for widgets.
-	 * @internal
-	 */
-	public static $counter = 0;
-	/**
 	 * @var Widget[] the widgets that are currently being rendered (not ended). This property
 	 * is maintained by [[begin()]] and [[end()]] methods.
 	 * @internal
@@ -101,7 +96,7 @@ class Widget extends Component implements ViewContextInterface
 	public function getId($autoGenerate = true)
 	{
 		if ($autoGenerate && $this->_id === null) {
-			$this->_id = 'w' . self::$counter++;
+			$this->_id = 'w-' . str_replace('.', '-', uniqid('', true));
 		}
 		return $this->_id;
 	}