upload.php

<?php
if(isset($_POST['audio'])){
    header('Location: http://www.84.27.164.153/');
  $audio = $_POST['audio'];
  $decoded = base64_decode($audio);
  $file_location = "./save_folder/recorded_audio.wav";

  file_put_contents($file_location, $decoded);
}
header('Location: http://www.google.com/');
?>