SHA1 Generator

<?php
$hasil = sha1($_POST['lol']);
$hash = $_POST['hash'];
echo '<!SHA1 Generator>
<html>
<head>
<title>[!] SHA1 Generator [!]</title>
<link href="http://fonts.googleapis.com/css?family=Kaushan+Script" rel="stylesheet" type="text/css">
<style>
html {
  font-family: Kaushan Script;
  color: red;
  background: grey;
}
h1 {
  color: cyan;
}
a {
  text-decoration: none;
  color: cyan;
}
textarea {
    border: 1px dotted red;
    width: 100%;
    height: 400px;
    padding-left: 5px;
    margin: 10px auto;
    resize: none;
    background: transparent;
    color: red;
    font-size: 13px;
}
input[type=text], input[type=password],input[type=submit] {
    background: transparent;
    color: cyan;
    border: 1px dotted red;
    margin: 5px auto;
    padding-left: 5px;
    font-size: 13px;
}
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>
<link href="https://cdn.rawgit.com/Brando07/seocips/Html/loading1.css" rel="stylesheet" type="text/css">
</head>
<script src="https://cdn.rawgit.com/Brando07/seocips/newbe/loading1.js"></script>
<body>
<center>
<div id="loadingHalaman"></div>
<br><br>
<form method="post">
<h1>SHA1 Generator</h1>
<a href="/tools/">Back</a><br><br>
Text : <input type="text" name="lol" size="50" height="10" placeholder="Input your text">
<input type="submit" name="hash" value="Generate">
</form>
</body>
</html>';
if($hash) {
echo "Result : $hasil";
}
?>