yii\console\controllers\AssetController now correctly handles relative image URLs if source and target CSS are under same directory

framework/CHANGELOG.md

@@ -7,6 +7,7 @@ Yii Framework 2 Change Log
 - Bug #6919: Fixed wrong namespaces under advanced application's TestCase classes (ivokund)
 - Bug #6940: `yii\web\Response::sendContentAsFile()` may not send correct `content-length` header (sadgnome)
 - Bug #6969: `yii\helpers\ArrayHelper::htmlEncode()` and `htmlDecode()` should not remove non-string data (qiangxue)
+- Bug #7037: `yii\console\controllers\AssetController` now correctly handles relative image URLs if source and target CSS are under same directory (klimov-paul)
 - Enh #5663: Added support for using `data-params` to specify additional form data to be submitted via the `data-method` approach (usualdesigner, qiangxue)
 - Enh #6106: Added ability to specify `encode` for each item of `yii\widgets\Breadcrumbs` (samdark, aleksanderd)
 - Enh #6493: Added support for the `Access-Control-Expose-Headers` header by `yii\filters\Cors` (usualdesigner)

framework/console/controllers/AssetController.php

@@ -613,6 +613,9 @@ EOD;
             if (strpos($inputUrl, '/') === 0 || preg_match('/^https?:\/\//is', $inputUrl) || preg_match('/^data:/is', $inputUrl)) {
                 return $fullMatch;
             }
+            if ($inputFileRelativePathParts === $outputFileRelativePathParts) {
+                return $fullMatch;
+            }
 
             if (empty($outputFileRelativePathParts)) {
                 $outputUrlParts = [];