TrashToKash-WebApp/otp.php at main · prenzizz/TrashToKash-WebApp · GitHub

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<?php
session_start();
include "dbcon.php";

if (!isset($_SESSION["email"])) {
    header("Location: register.php");
    exit();
}

$email = $_SESSION["email"];
$error = "";

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $otp = trim($_POST["otp"]);

    if (!preg_match("/^\d{6}$/", $otp)) {
        $error = "Enter a valid 6-digit OTP.";
    } else {
        $stmt = $conn->prepare("SELECT * FROM users WHERE email=? AND otp_code=?");
        $stmt->bind_param("ss", $email, $otp);
        $stmt->execute();
        $res = $stmt->get_result();

        if ($res->num_rows > 0) {
            $row = $res->fetch_assoc();
            $user_unique_id = $row['user_unique_id'];

            // Clear OTP after successful verification
            $update = $conn->prepare("UPDATE users SET otp_code=NULL WHERE email=?");
            $update->bind_param("s", $email);
            $update->execute();

            $_SESSION["user_id"] = $user_unique_id;
            $_SESSION["logged_in"] = true;

            header("Location: home.php");
            exit();
        } else {
            $error = "Incorrect OTP. Try again.";
        }
    }
}
?>

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Enter OTP</title>

<style>
body {
    font-family: Arial, sans-serif;
    background: #a8d9d6;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.otp-container {
    background: #74b5b4;
    width: 80%;
    max-width: 400px;
    padding: 25px;
    border-radius: 18px;
    text-align: center;
    box-shadow: 0px 4px 12px rgba(0,0,0,0.15);
}

h2 {
    font-size: 28px;
    margin-bottom: 10px;
    color: #0f3f3f;
}

p {
    font-size: 16px;
    color: #0f3f3f;
    margin-bottom: 20px;
}

input {
    width: 80%;
    padding: 14px;
    font-size: 22px;
    border-radius: 10px;
    border: none;
    outline: none;
    text-align: center;
    margin-bottom: 15px;
}

button {
    width: 60%;
    padding: 14px;
    background: #1e3b36;
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 20px;
    cursor: pointer;
    transition: 0.2s ease;
}

button:hover {
    opacity: 0.9;
}

.error {
    color: darkred;
    font-size: 16px;
    margin-bottom: 10px;
}

/* MOBILE OPTIMIZATION */
@media (max-width: 480px) {
    h2 {
        font-size: 24px;
    }
    .otp-container {
    margin-top: -35%;
}
    p {
        font-size: 14px;
    }
    input {
        font-size: 20px;
        padding: 12px;
    }
    button {
        font-size: 18px;
        padding: 12px;
    }
}
</style>
</head>

<body>
<div class="otp-container">
    <h2>Enter OTP</h2>
    <p>An OTP has been sent to <strong><?php echo htmlspecialchars($email); ?></strong></p>

    <?php if ($error): ?>
        <div class="error"><?= $error ?></div>
    <?php endif; ?>

    <form method="POST">
        <input type="text" name="otp" placeholder="6-digit OTP" maxlength="6" required>
        <button type="submit">Verify</button>
    </form>
</div>
</body>
</html>