title: Unable to set session.save_handler in my code
body: <p>After I upgraded PHP version of my website to 7.3, I started receiving this error message:</p>
  
  <blockquote>
    <p>Recoverable fatal error: ini_set(): Cannot set 'user' save handler by ini_set() or session_module_name()</p>
  </blockquote>
  
  <p>After my investigation, I found that the problem is in this line:</p>
  
  <pre><code>ini_set('session.save_handler', 'user');
  </code></pre>
  
  <p>As I see in <code>php.ini</code>, the default value is "files". I try to change the value to files, but it's the same. Until PHP 7.1, everything works fine, but on PHP 7.2 and PHP 7.3, I have this problem. I really can't understand why this function not working. It doesn't return any error, just a blank page with code 200 (not 500 as server error). </p>
  
  <p>How do I solve this problem?</p>