php pass decryptor

<?php $r="";if(isset($_POST['guess']) && isset($_POST['key'])){if(password_verify($_POST['guess'],$_POST['key'])){$r="t";}else{$r="f";}}?><title>PHP PASS</title><p>PHP PASS CRACKER<?php if($r=="t"){echo" - <span style='color:green'>CRACKED</span>";}elseif($r=="f"){echo" - <span style='color:red'>TRY AGAIN</span>";}?></p><form action=""method="POST"><input type="text"placeholder="Key"name="key"value="<?php if(isset($_POST['key'])){echo$_POST['key'];}?>"><br><input type="text"placeholder="Guess"name="guess"value="<?php if(isset($_POST['guess'])){echo$_POST['guess'];}?>"><br><input type="submit"></form><?php if(isset($r)){if($r=="t"){$q="<span style='color:green'>IS</span>";}elseif($r=="f"){$q="is <span style='color:red'>NOT</span>";}echo"<p>".$_POST['guess']." $q the password to the key ".$_POST['key']."</p>";}?>