Library POST

if (isset($_POST['Title'], $_POST['Author'], $_POST['Date'], $_POST['Type']))
{
	$title = mysqli_real_escape_string($link, $_POST['Title']);
	$author = mysqli_real_escape_string($link, $_POST['Author']);
	$date = mysqli_real_escape_string($link, $_POST['Date']);
	$type = mysqli_real_escape_string($link, $_POST['Type']);
	$sql = 'INSERT INTO library SET
			Title="' . $title . '";
			Author="' . $author . '";
			PublishDate="' . $date . '";
			Type="' . $type . '";
	if (!mysqli_query($link, $sql))
	{
		$error = 'Error adding submitted item: ' . mysqli_error($link);
		include 'error.html.php';
		exit();
	}