Fixes #16580: Delete unused php message files in MessageController if $removeUnused option is on

framework/CHANGELOG.md

@@ -4,6 +4,7 @@ Yii Framework 2 Change Log
 2.0.16 under development
 ------------------------
 
+- Bug #16580: Delete unused php message files in MessageController if `$removeUnused` option is on (Groonya)
 - Bug #16022: Fix UniqueValidator for PostgreSQL. Checks the uniqueness of keys in `jsonb` field (lav45)
 - Bug #16903: Fixed 'yii\validators\NumberValidator' method 'isNotNumber' returns false for true/false value (annechko)
 - Bug #16648: Html::strtolower() was corrupting UTF-8 strings (Kolyunya)

framework/console/controllers/MessageController.php

@@ -665,6 +665,10 @@ EOD;
             $this->stdout("Saving messages to $coloredFileName...\n");
             $this->saveMessagesCategoryToPHP($msgs, $file, $overwrite, $removeUnused, $sort, $category, $markUnused);
         }
+
+        if ($removeUnused) {
+            $this->deleteUnusedPhpMessageFiles($dirName, array_keys($messages));
+        }
     }
 
     /**
@@ -883,6 +887,17 @@ EOD;
         }
     }
 
+    private function deleteUnusedPhpMessageFiles($dirName, $existingCategories)
+    {
+        $messageFiles = FileHelper::findFiles($dirName);
+        foreach ($messageFiles as $file) {
+            $category = preg_replace('#\.php$#', '', basename($file));
+            if (!in_array($category, $existingCategories, true)) {
+                unlink($file);
+            }
+        }
+    }
+
     /**
      * @param string $configFile
      * @throws Exception If configuration file does not exists.