Base64 Encode Decoder By Grey Clark

 <form action="" method="post">
 <span>Encode Text</span><br>
 <textarea name="encode"></textarea>
 <input type="submit" name="submit">
 <br>
 <span>Decode Text</span><br>
  <textarea name="decode"></textarea>
  <input type="submit" name="submit-2">
 </form>
<?php
if(isset($_POST['submit'])){

$encode = $_POST['encode'];

$x = base64_encode($encode);

echo "<h1 style='color:green; text-align:center;'>Result Box: <h1><textarea style='width:100%; height:700px;'>$x</textarea>";

 };

 if(isset($_REQUEST['submit-2'])){

 $decode = $_REQUEST['decode'];

 $y = base64_decode($decode);
 echo "<h1 style='color:green; text-align:center;'>Result Box: <h1><textarea style='width:100%; height:700px;'>".htmlspecialchars($y)."</textarea>";

 }; ?>