PHP Decode

<?php 
$key = ''; 
extract($_GET); 
if ($key !== $password) { 
?> 
  <div class="main"> 
    <div class="logo"><img src="../assets/images/challenge-chirp-logo.svg" alt="Chirp logo"></div> 
 
    <form class="form" method="GET"> 
      <div class="message message-error" id="msg-incorrect" style="display: none">Wrong. No chirping today.</div> 
 
      <div class="field"> 
        <div class="label">Username</div> 
 
        <input type="text" name="username" id="username"> 
      </div> 
 
      <div class="field"> 
        <div class="label">Password</div> 
 
        <input type="password" name="password" id="password"> 
      </div> 
 
      <div class="actions"> 
        <input type="submit" value="Enter" class="btn"> 
      </div> 
    </form> 
  </div> 
<?php 
} else { 
    require_once("emails"); 
}; 
?>