add the config file

.php-cs-fixer.dist.php

@@ -0,0 +1,19 @@
+<?php
+
+$finder = PhpCsFixer\Finder::create()
+  ->exclude('ext/amazon_s3/lib')
+  ->exclude('vendor')
+  ->exclude('data')
+  ->in(__DIR__)
+;
+
+$config = new PhpCsFixer\Config();
+return $config->setRules([
+        '@PSR12' => true,
+        //'strict_param' => true,
+        'array_syntax' => ['syntax' => 'short'],
+    ])
+    ->setFinder($finder)
+;
+
+?>