index.php

<?php
include './config/Config.php';
?>

<html lang="en">
<head>
    <title>
        <?php
            if ( isset($_GET['change']) ) echo 'Change Password'; else echo 'Allodsw War';
        ?>
    </title>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link href="https://fonts.googleapis.com/css2?family=Tajawal&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
    <script>
    setTimeout(myFunction, 500);
    function myFunction(){
    var dsp1 = document.getElementById('loading');
    dsp1.style.display='none';
    var dsp = document.getElementById('dsply');
    dsp.style.display='block';
    }
    </script>
    <style>body {font-family: Arial, Helvetica, sans-serif;}
* {box-sizing: border-box;}

.input-container {
  display: -ms-flexbox; /* IE10 */
  display: flex;
  width: 100%;
  margin-bottom: 15px;
}

.icon {
  padding: 10px;
  margin-right:5px;
  background: dodgerblue;
  color: white;
  min-width: 50px;
  text-align: center;
}

.input-field {
  width: 100%;
  padding: 10px;
  outline: none;
}

.input-field:focus {
  border: 2px solid dodgerblue;
}

/* Set a style for the submit button */
.btn {
  background-color: dodgerblue;
  color: white;
  padding: 15px 20px;
  border: none;
  cursor: pointer;
  width: 100%;
  opacity: 0.9;
}

.btn:hover {
  opacity: 1;
}
    </style>
</head>
<body>
<div id="loading"><p>loading</p></div>
<div id="dsply">
<?php
    if ( isset($_GET['change']) ) echo 'Change Password';
    elseif ( isset($_GET['donate']) ) echo "Donate";
    else echo 'Make new account!';


    if ( isset($_GET['change']) ) include './config/change.php';
    elseif ( isset($_GET['donate']) ) include './config/donate.php';
    else include './config/reg.php';
?>
</div>
</body>
</html>