[RESOLVED] Need help with an if statement

[Seitan]

Im trying to make it so that a user cannot submit something unless he is logged in, so far this is what I have

// Check if the form has been submitted.
if (isset($POST['submitted'])) {
if (($SESSION['user_id']) && ($_SESSION['user_name'])) = NULL {
echo '<h1>Sorry</h1>
<p class="error">You need to be logged in to use this feature</p>'; // Public message.
echo '<p>' . mysql_error() . '<br /><br />Query: ' . $query . '</p>';
// Debugging message.
include ('../php/footer.php');
exit();
} else {

Unfortunately it lets me submit stuff even when I am not logged in. HELP?

[bradgrafelman]

1. Instead of saying things like

   if (!$_SESSION['user']) {

   , you should be using something like:

   if (!empty($_SESSION['user'])) {

2. Even if you were trying to compare them to NULL, '=' isn't a comparison operator. Look at this man page to see what comparison operators are: [man]language.operators.comparison[/man].

3. The ' = NULL' bit is outside of the ending ')' of the if() statement.

Of course, after following point #1, #'s 2 and 3 will become rather moot - I only mention them to help you improve your coding methods in general.

EDIT: Also, when posting PHP code, please use the board's [PHP][/PHP] bbcode tags - they make the code much, much easier to read (as well as aiding the diagnosis of syntax errors).