fix putenv

tools/putenv/putenv.php

@@ -2,11 +2,15 @@
 
 namespace Tools;
 
+use Exception;
+
 class PutEnv {
+
     private string $file;
     private string $key;
     private string $value;
     private array $content;
+
     public function __construct() {
         $argv = $_SERVER['argv'];
         $argc = sizeof($argv);