Excluding Characters

[Anon]

Hi:

I am trynig to make sure that the text only contain a-z and 0-9. How can I do this?

Thanks for the help. I know it's probably simple.

Jeremy

[Anon]

I would hardly consider myself an expert, but I think this is how you do it:

<?php
if (!eregi("^{[[:alnum:]]",} $variable) {
$variable = ereg_replace("[^{[[:alnum:]]]",} "", $variable);
} else {
do whatever you want to here
}
?>

Like I said, i'm not really an expert on regular expressions yet and this code stands a very good chance of producing errors.