fixed issue with UTF-8 characters in help description parsing

framework/CHANGELOG.md

@@ -9,6 +9,7 @@ Yii Framework 2 Change Log
 - Bug #6557: Link URLs generated by `yii\widgets\Menu` are not encoded (qiangxue)
 - Bug #6632: `yii\di\Container::get()` did not handle config parameter correctly when it is passed as a constructor parameter (qiangxue)
 - Bug #6648: Added explicit type casting to avoid dblib issues on SQL Server 2014 (o-rey)
+- Bug #6691: Fixed console help description parsing with UTF8 characters (cebe)
 - Enh #4502: Added alias support to URL route when calling `Url::toRoute()` and `Url::to()` (qiangxue, lynicidn)
 - Enh #6247: Logger and error handler are now using slightly less memory (stepanselyuk, samdark)
 - Enh #6434: Added `yii\behaviors\SluggableBehavior::immutable` to support keeping the generated slug unchanged (trntv)

framework/console/Controller.php

@@ -486,7 +486,7 @@ class Controller extends \yii\base\Controller
      */
     protected function parseDocCommentSummary($reflection)
     {
-        $docLines = preg_split('~\R~', $reflection->getDocComment());
+        $docLines = preg_split('~\R~u', $reflection->getDocComment());
         if (isset($docLines[1])) {
             return trim($docLines[1], ' *');
         }