Add to the login assignment three more pages

1) Upload a file.
	Check to see if the person is logged in.
	Check to see if it's a reasonable file extension
	Copy it to the database.

2) List the files
	Check to see if the person is logged in
	Show them a list of uploaded files.  Each filename is a link the show page.


3) Show/Play a file
	Check to see if they're logged in.
	Show the file.


For these new pages, you cannot get security through header-location things.
You will probably need to use the alternative if syntax.

Due Thr Mar 10

Remember: The data for the pic must be longblog.

Also, printing a longblob probably doesn't do what you want.  But this might be useful:

mysql> select id, filename, length(pic)  from pics;

Hints:  I used the following lines in my implementation (which was PDO)
$data = file_get_contents($_FILES['file']['tmp_name']);

...

$stmt = $dbh->prepare("insert into pics (filename, pic) values (?,?);");

...

if ($stmt->execute(array($_FILES['file']['name'], $data))) {

I used the following lines in my showpic
$stmt = $dbh->prepare("SELECT id, filename, pic, mimetype FROM pics where id = ?");

...

$row = $stmt->fetch();

...

header("Content-type:" . $row['mimetype']");

....

print($row['pic']);