Trying to add items to a database using php - php

Question

I am trying to a items to my database (sql) using php and a form, however the data is not being added and nothing seems to happening i just stay on the create.php page.
php code
<?php
$servername = "localhost";
$username = "root";
$password = "root";
$dbname = "PolyTest";
// Create connection
$conn = mysql_connect($servername, $username, $password);
mysql_select_db($dbname)
$doorName = $_POST['doorName'];
$doorDes = $_POST['doorDes'];
$doorPrice = $_POST('doorPrice');
$doorColour = $_POST('doorColour');
$doorImage = $_POST['doorImage'];
if(!$_POST['submit']){
echo "please fill in the boxs";
header('Location: dooradd.php');
} else {
mysql_query("INSERT INTO Doors ('ID', 'name', 'description', 'price', 'colour', 'image') VALUES(NULL, '$doorName', '$doorDes', '$doorPrice', '$doorColour', '$doorImage')") or die(mysql_error());
echo "Door been added!";
header('Location: doorlist.php');
}
?>
HTML FORM
<form class="add" action="doorCreate.php" method="post">
<input type="text" name="doorName" value="doorName">
<input type="text" name="doorDes" value="doorDes">
<input type="text" name="doorPrice" value="doorPrice">
<input type="text" name="doorColour" value="doorColour">
<input type="text" name="doorImage" value="doorImage">
<input type="submit" name="submit">
</form>

Answer 1

change mysql_select_db($dbname) with mysql_select_db($dbname);
and change;
$doorPrice = $_POST('doorPrice');
$doorColour = $_POST('doorColour');
with
$doorPrice = $_POST['doorPrice'];
$doorColour = $_POST['doorColour'];