title: Uncaught Error: Call to undefined function stats_cdf_t()
body: <p>I have to calculate an Excel formula(F.DIST.RT) in PHP. but receiving an error.
  e.g,</p>
  
  <pre><code>F.DIST.RT(4, 2, 1)
  </code></pre>
  
  <p>As defined here:
  <a href="https://www.php.net/manual/en/function.stats-cdf-t.php" rel="nofollow noreferrer">https://www.php.net/manual/en/function.stats-cdf-t.php</a></p>