mysql_connect.php

<?php

  $servername = getenv('IP');
  $username = getenv('C9_USER');
  $password = "";
  $database = "connect";
  $dbport = 3306;

  // Create connection
  $db = new mysqli($servername, $username, $password, $database, $dbport);

  // Check connection
  if ($db->connect_error) {
      die("Connection failed: " . $db->connect_error);
  }
  echo "Connected successfully (".$db->host_info.")";

?>