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registrasi.php
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<?php
// Larang jika tanda password isi = dan ;
session_start();
if(!empty($_SESSION["LOGIN"])) {
header("Location: /");
}
function registrasi() {
if(!file_exists("basis-data")) {
mkdir("basis-data", 0777);
}
$username = $_POST["username"];
$password = $_POST["password"];
if(file_exists("basis-data/user.txt")) {
// Cek file
$file = fopen("basis-data/user.txt", "r");
if(!$file) {
echo "<script>alert('Gagal membuka database')</script>";
return;
}
while(!feof($file)) {
$datas = fgets($file);
if(!empty(trim($datas))) {
$datas = explode(";", $datas);
$dataArray = [];
foreach($datas as $data) {
$array = explode("=", $data);
$dataArray[$array[0]] = rtrim($array[1]);
}
if($dataArray["username"] == $username) {
echo "<script>alert('Username sudah tersedia')</script>";
return;
}
}
}
fclose($file);
register($username, $password);
} else {
register($username, $password);
}
}
function register($username, $password) {
// Write
$file = fopen("basis-data/user.txt", "a");
if(!$file) {
echo "<script>alert('Gagal membuka database')</script>";
return;
}
$data = "username=" . $username . ";password=" . $password . "\n";
fwrite($file, $data);
fclose($file);
header("Location: login.php");
}
if($_SERVER["REQUEST_METHOD"] === "POST") {
registrasi();
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Registrasi</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: monospace;
}
body {
padding: 1rem;
}
.mb-3 {
margin-bottom: 1rem;
}
form label {
display: block;
margin-bottom: 1rem;
}
form input {
width: 100%;
padding: 1rem;
}
form button {
margin: 1rem 0;
padding: 0.4rem 0.8rem;
}
h2 {
margin-bottom: 1rem;
}
button a {
color: black;
display: block;
text-decoration: none;
padding: 0.4rem 0.8rem;
}
</style>
</head>
<body>
<h2>Registrasi</h2>
<form action="" method="post">
<div class="mb-3">
<label for="username">Username</label>
<input type="text" name="username" id="username" required autofocus>
</div>
<div class="mb-3">
<label for="password">Password</label>
<input type="password" name="password" id="password" required>
</div>
<button type="submit">Registrasi</button>
</form>
<button><a href="login.php">Login</a></button>
<script>
if(window.history.replaceState) {
window.history.replaceState(null, null, window.location.href);
}
</script>
</body>
</html>