[PHP] Checkbox werkt niet

Hallo, ik zit met een probleem.

Ik heb een formulier waarbij je kunt aanvinken of je ingelogd wilt blijven.. Maar als je het aanvinkt voert ie niks uit

Checken:

[COLOR= #0000BB]<?php
$ingelogdblijven[/COLOR] [COLOR= #007700]=[/COLOR] [URL="http://www.php.net/mysql_real_escape_string"]mysql_real_escape_string[/URL][COLOR= #007700]([/COLOR][COLOR= #0000BB]$_POST[/COLOR][COLOR= #007700][[/COLOR][COLOR= #DD0000]ingelogdblijven[/COLOR][COLOR= #007700]]);[/COLOR]
[URL="http://www.php.net/if"]if[/URL] [COLOR= #007700]([/COLOR][URL="http://www.php.net/empty"]empty[/URL][COLOR= #007700]([/COLOR][COLOR= #0000BB]$ingelogdblijven[/COLOR][COLOR= #007700]))
                {[/COLOR]
                    [COLOR= #FF8000]//Niks uitvoeren[/COLOR]
                [COLOR= #007700]}[/COLOR][URL="http://www.php.net/else"]else[/URL][COLOR= #007700]{[/COLOR]
                    [COLOR= #0000BB]$code[/COLOR] [COLOR= #007700]=[/COLOR] [URL="http://www.php.net/rand"]rand[/URL][COLOR= #007700]([/COLOR][COLOR= #0000BB]111111[/COLOR][COLOR= #007700],[/COLOR][COLOR= #0000BB]9999999999999999999[/COLOR][COLOR= #007700]);[/COLOR]
                    [COLOR= #0000BB]$code2[/COLOR] [COLOR= #007700]=[/COLOR] [URL="http://www.php.net/md5"]md5[/URL][COLOR= #007700]([/COLOR][COLOR= #0000BB]$code[/COLOR][COLOR= #007700]);[/COLOR]
                    [URL="http://www.php.net/setcookie"]setcookie[/URL][COLOR= #007700]([/COLOR][COLOR= #DD0000]"site"[/COLOR][COLOR= #007700],[/COLOR] [COLOR= #0000BB]$code2[/COLOR][COLOR= #007700],[/COLOR] [URL="http://www.php.net/time"]time[/URL][COLOR= #007700]() +[/COLOR] [COLOR= #0000BB]9999[/COLOR][COLOR= #007700]*[/COLOR][COLOR= #0000BB]60[/COLOR][COLOR= #007700]);[/COLOR]
                    [URL="http://www.php.net/mysql_query"]mysql_query[/URL][COLOR= #007700]([/COLOR][COLOR= #DD0000]"UPDATE table SET loginhash = "[/COLOR] [COLOR= #007700].[/COLOR] [COLOR= #0000BB]$code2[/COLOR] [COLOR= #007700].[/COLOR] [COLOR= #DD0000]" WHERE naam = "[/COLOR] [COLOR= #007700].[/COLOR] [URL="http://www.php.net/mysql_real_escape_string"]mysql_real_escape_string[/URL][COLOR= #007700]([/COLOR][COLOR= #0000BB]$_POST[/COLOR][COLOR= #007700][[/COLOR][COLOR= #DD0000]user[/COLOR][COLOR= #007700]]) .[/COLOR][COLOR= #DD0000]""[/COLOR][COLOR= #007700])[/COLOR] or [URL="http://www.php.net/die"]die[/URL][COLOR= #007700]([/COLOR][URL="http://www.php.net/mysql_error"]mysql_error[/URL][COLOR= #007700]());
                }[/COLOR]
?>

Formulier:

<h2>Inloggen</h2>
<form action="" method="post" enctype="multipart/form-data" /> 
Gebruikersnaam:<br />
<input name="user" type="text" class="input" /><br />
Wachtwoord:<br />
<input name="pass" type="password" class="input" /><br /><br />
<input type="checkbox" name="ingelogdblijven" value="ingelogd" class="input" />Blijf ingelogd.<br /><br />
<input type="submit" name="submit" value="Inloggen" class="button" /></td>
</form>

Alvast bedankt