uberCMS - - Limited Accounts Registered

[Linkestt]

I need the script to limit the accounts that can register per IP address.
I found this code from a rival forum, but when it's entered in my register page the page goes blank (all white).

Is there something missing in the code? If so, please help. Or find the script for me. (y)

Code:
<?php $sql = mysql_query("SELECT * FROM users WHERE ip_last='$_SERVER[REMOTE_ADDR]'");
if(mysql_num_rows($sql) > 0) {
echo '<script type="text/javascript">
<!--

alert ("You can only create 1 account per IP!")

// -->
</script>';
echo '<meta http-equiv="refresh" content="1 url=index.php"> ';
die;
}

?>

 

[JayC]

if (mysql_num_rows(mysql_query("SELECT * FROM users WHERE ip_last = '" . $_SERVER["REMOTE_ADDR"] . "'")) > 9)
{
die('<h1>Hold up!</h2><hr>You have way too many accounts. You are not allowed any more.');
}

if (LOGGED_IN)
{
header("Location: " . WWW . "/me");
exit;
}

 

[Proximity]

<?php $sql = mysql_query("SELECT * FROM users WHERE ip_last='$_SERVER[REMOTE_ADDR]'");
if(mysql_num_rows($sql) > 0) {
echo '<script type="text/javascript">


alert ("You can only create 1 account per IP!")


</script>';
echo '<meta http-equiv="refresh" content="1 url=index.php"> ';
die;
}

?>

you have
<!--
// -->

 

[JayC]

<?php $sql = mysql_query("SELECT * FROM users WHERE ip_last='$_SERVER[REMOTE_ADDR]'");
if(mysql_num_rows($sql) > 0) {
echo '<script type="text/javascript">


alert ("You can only create 1 account per IP!")


</script>';
echo '<meta http-equiv="refresh" content="1 url=index.php"> ';
die;
}

?>

you have
<!--
// -->

Didn't see the <!-- and --> but yeah Elyk is right, that would be commenting it out if it was right thing... lol
<!-- doesn't comment php files
/* This is a multi line comment
yet another line of comment */
// This is a one-line style comment

 

[Linkestt]

So which code should I use?

 

[Balls]

So which code should I use?

Elyks

 

[Linkestt]

His code is making my register page white again.

 

[JayC]

Does the code I gave you work? That's direct code from my UberCMS edit

 

[Linkestt]

Does your code go in the register.php or tpl?

 

[JayC]

register.php

 

[Linkestt]

It works, but for some reason users who have never registered our being told they have too many accounts.