lowercase

[robfog]

Is there something simple I can use to tell a user that the username they have input needs to be in lowercase if they enter it in uppercase.

[Cogen]

I'm not sure if I'm understanding you properly, but if you just want all of your users to use lowercase usernames, then you could just put a little sentence specifying that where they will enter it.
You could also just accept the Upper case username and then use either the mb_strtolower() or strtolower() functions to convert them to lowercase automatically.

[laserlight]

Simply using strtolower() on the string probably is best.

Youmight want to check out ctype_lower() though:
http://www.php.net/manual/en/function.ctype-lower.php

[robfog]

Great minds think alike. I have done both of these.
What the bottom of the situation is a database search occurs to ensure the username does not already exist. I can't get the search to operative in a case insensitive way so I thought I would keep everything in lower case.

I was trying to get something like this going:

if (!eregi("^[a-z0-9 ]+$", ($Username)) {

$error = "Username needs to be in lowercase.";

return $error;
}

to check if it is in uppercase.

[robfog]

ctype_lower() looks interesting.

My skills aren't great any ideas how I would get it to check on what was typed into the field?