Kako napraviti formu za kreiranje naloga?

U ovome primjeru kreiraćemo jednostavnu formu za kreiranje naloga.

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <title>IT TUTORIJALI | Kreiranje naloga</title>
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:400,700">
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
  <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"></script>
  <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script>
  <style>
    body {
      color: #999;
      background: #f5f5f5;
      font-family: 'Roboto', sans-serif;
    }

    .form-control,
    .form-control:focus,
    .input-group-addon {
      border-color: #e1e1e1;
      border-radius: 0;
    }

    .signup-form {
      width: 390px;
      margin: 0 auto;
      padding: 30px 0;
    }

    .signup-form h2 {
      color: #636363;
      margin: 0 0 15px;
      text-align: center;
    }

    .signup-form .lead {
      font-size: 14px;
      margin-bottom: 30px;
      text-align: center;
    }

    .signup-form form {
      border-radius: 1px;
      margin-bottom: 15px;
      background: #fff;
      border: 1px solid #f3f3f3;
      box-shadow: 0px 2px 2px rgba(0, 0, 0, 0.3);
      padding: 30px;
    }

    .signup-form .form-group {
      margin-bottom: 20px;
    }

    .signup-form label {
      font-weight: normal;
      font-size: 13px;
    }

    .signup-form .form-control {
      min-height: 38px;
      box-shadow: none !important;
      border-width: 0 0 1px 0;
    }

    .signup-form .input-group-addon {
      max-width: 42px;
      text-align: center;
      background: none;
      border-bottom: 1px solid #e1e1e1;
      padding-left: 5px;
    }

    .signup-form .btn,
    .signup-form .btn:active {
      font-size: 16px;
      font-weight: bold;
      background: #19aa8d !important;
      border-radius: 3px;
      border: none;
      min-width: 140px;
    }

    .signup-form .btn:hover,
    .signup-form .btn:focus {
      background: #179b81 !important;
    }

    .signup-form a {
      color: #19aa8d;
      text-decoration: none;
    }

    .signup-form a:hover {
      text-decoration: underline;
    }

    .signup-form .fa {
      font-size: 21px;
      position: relative;
      top: 8px;
    }

    .signup-form .fa-paper-plane {
      font-size: 17px;
    }

    .signup-form .fa-check {
      color: #fff;
      left: 9px;
      top: 18px;
      font-size: 7px;
      position: absolute;
    }
  </style>
</head>

<body>
  <div class="signup-form">
    <form action="../confirmation.php" method="post">
      <h2>Kreiraj nalog</h2>
      <p class="lead">Besplatno je i ne traje duže od 20 sekundi.</p>
      <div class="form-group">
        <div class="input-group">
          <span class="input-group-addon"><i class="fa fa-user"></i></span>
          <input type="text" class="form-control" name="username" placeholder="Korisničko ime" required="required">
        </div>
      </div>
      <div class="form-group">
        <div class="input-group">
          <span class="input-group-addon"><i class="fa fa-paper-plane"></i></span>
          <input type="email" class="form-control" name="email" placeholder="Email" required="required">
        </div>
      </div>
      <div class="form-group">
        <div class="input-group">
          <span class="input-group-addon"><i class="fa fa-lock"></i></span>
          <input type="text" class="form-control" name="password" placeholder="Lozinka" required="required">
        </div>
      </div>
      <div class="form-group">
        <div class="input-group">
          <span class="input-group-addon">
            <i class="fa fa-lock"></i>
            <i class="fa fa-check"></i>
          </span>
          <input type="text" class="form-control" name="confirm_password" placeholder="Potvrdi lozinku" required="required">
        </div>
      </div>
      <div class="form-group">
        <button type="submit" class="btn btn-primary btn-block btn-lg">Registruj se</button>
      </div>
      <p class="small text-center">Klikom na dugme za registraciju pristajete na naše<br>
        <a href="#">Pravila </a> &amp; <a href="#">Uslove korištenja</a>.
      </p>
    </form>
    <div class="text-center">Već imaš nalog? <a href="#">Prijavi se</a>.</div>
  </div>
</body>

</html>