Allow overwrite of a value in the .env file

Dotenv.php

@@ -92,14 +92,19 @@ final class Dotenv {
    * @param string $value
    *   The value of the environment variable.
    */
-  public function put($key, $value) {
+  public function put($key, $value, $overwrite = FALSE) {
+    $envContent = file_exists('.env') ? file_get_contents('.env') : '';
+    $data = $this->dotenv->parse($envContent);
     $key = strtoupper($key);
-    if (!empty(getenv($key))) {
+    if (!$overwrite && isset($data[$key])) {
       return;
     }
-    $env = file_exists('.env') ? file_get_contents('.env') : '';
-    $env .= PHP_EOL . $key . '=' . $value . PHP_EOL;
-    file_put_contents('.env', $env);
+    $data[$key] = $value;
+    $envContent = '';
+    foreach ($data as $key => $value) {
+      $envContent .= $key . '=' . $value . PHP_EOL;
+    }
+    file_put_contents('.env', $envContent);
     $this->load();
     passthru(escapeshellcmd('git -c "user.email=dotenv@lakedrops.com" ignore .env'));
   }