title: phpdotenv not working with me and showing blank page
body: <p>I'm new in vlucas/phpdotenv and I want to test it before using it in my project so I made a test folder and installed vlucas/phpdotenv in it and this is my code page:</p>
  <pre><code>&lt;?php
  
  require_once realpath(__DIR__ . &quot;/vendor/autoload.php&quot;);
  
  use Dotenv\Dotenv;
  
  $dotenv =  Dotenv::createImmutable(__DIR__);
  
  $dotenv-&gt;load();
  
  $app_name = getenv(&quot;APP_NAME&quot;);
  
  echo $app_name;
  
  ?&gt;
  </code></pre>
  <p><strong>and there is no output</strong> I only get a blank page and when I make <code>var_dump($app_name);</code> I get an error</p>
  <pre><code>bool(false)
  </code></pre>
  <p>What is the problem?</p>