Untitled

<!DOCTYPE>
<html>
  <head>
    <link href="CSS/web.css" type="text/css" rel="stylesheet" >
  </head>
  <body>
    <?php
      session_start();
    ?>
    <div id="content">
      <div id="header">
        <img src="Pictures/senseiPizza.jpg" alt="Logo" width="100" height="90">
        <h1>Sensei Pizza</h1>
        <div class="address">
          <h2>Restaurant Location:</h2>
          <span>28 Sewer Street, (Shredder Town) New York</span>
        </div>
      </div>
      <div class="motto">
        <h3>Sensei Pizza will fufill its mission ... to feed you.</h3>
      </div>
      <div class="subContent">
        <nav>
          <ul>
            <li><a href="custhome.php">Home</a></li>
            <li><a href="profile.php">Profile</a></li>
            <li><a href="logout.php">Logout</a></li>
          </ul>
        </nav>
        <div id="main">
          <p>Dear customer
             To indulge in our wonderful pizza online system please register
               filling in the relevant information below and click the register button.
          </p>
          <form method="post" action="<?php $_PHP_SELF ?>">
      			Name:<input type="text" name="name"><br>
            Surname:<input type="text" name="surname"><br>
            Address:<input type="text" name="address"><br>
            Phone No:<input type="text" name="phone"><br>
            Email:<input type="text" name="email"><br>
      			<input type="submit" name="update" id="update" value="Update Details">
      		</form>
          <?php
          if(isset($_POST['update']))
          {
            $servername = "localhost";
            $username = "root";
            $password = "";
            $dbname = "senseipizza";

            // Create connection
            $conn = mysqli_connect($servername, $username, $password, $dbname);
            // Check connection
            if (!$conn) {
                die("Connection failed: " . $conn->connect_error);
            }
            $name = $_POST['name'];
            $surname = $_POST['surname'];
            $phone = $_POST['phone'];
            $address = $_POST['address'];
            $email = $_POST['email'];
            $ID = $_SESSION["customerID"];
            $sql = "UPDATE customer SET customerName=$name, customerSurname=$surname
            , customerPhone=$phone, customerAddress=$address
            , customerEmail=$email WHERE customerID=$ID";

            if ($conn->query($sql) === TRUE) {
                echo "Your details have been updated";
            } else {
                echo "There has been an error recording your details: " . $conn->error;
            }

            mysqli_close($conn);
        }
          ?>
        </div>
      </div>

      <footer>
        <p> Sensei Pizza is a pizza registered restaurant and copywrited by the unifications act of the United States &#169; 2016 </p>
      </footer>
    </div>
  </body>
  <?php

   ?>
</html>