OpenVPN-Admin/include/functions.php

<?php

  function printError($str) {
    echo '<div class="alert alert-danger" role="alert">' . $str . '</div>';
  }

  function printSuccess($str) {
    echo '<div class="alert alert-success" role="alert">' . $str . '</div>';
  }

  function isInstalled($bdd) {
    $req = $bdd->prepare("SHOW TABLES LIKE 'admin'");
    $req->execute();

    if(!$req->fetch())
      return false;

    return true;
  }

  function hashPass($pass) {
    return password_hash($pass, PASSWORD_DEFAULT);
  }

  function passEqual($pass, $hash) {
    return password_verify($pass, $hash);
  }

?>