Merge pull request #2736 from ivokund/patch-1

framework/CHANGELOG.md

@@ -139,6 +139,7 @@ Yii Framework 2 Change Log
 - Enh #2646: Added support for specifying hostinfo in the pattern of a URL rule (qiangxue)
 - Enh #2661: Added boolean column type support for SQLite (qiangxue)
 - Enh #2670: Changed `console\Controller::globalOptions()` to `options($actionId)` to (make it possible to) differentiate options per action (hqx)
+- Enh #2735: Added support for `DateTimeInterface` in `Formatter` (ivokund)
 - Enh: Added support for using arrays as option values for console commands (qiangxue)
 - Enh: Added `favicon.ico` and `robots.txt` to default application templates (samdark)
 - Enh: Added `Widget::autoIdPrefix` to support prefixing automatically generated widget IDs (qiangxue)

framework/base/Formatter.php

@@ -339,7 +339,7 @@ class Formatter extends Component
 	{
 		if (is_string($value)) {
 			return is_numeric($value) || $value === '' ? (int)$value : strtotime($value);
-		} elseif ($value instanceof DateTime) {
+		} elseif ($value instanceof DateTime || $value instanceof \DateTimeInterface) {
 			return $value->getTimestamp();
 		} else {
 			return (int)$value;