Special Characters

[Anon]

I want to check if a user enters speical characters. I know how to check for one character at a time but how to check for a whole bunch at the same time. The following is what I have so far:

<?
if (ereg("\%", $username)){
echo"You have an character in your username";
}

?>

[Anon]

You have to learn regular expression, and it's a little bit tricky but very useful. I'm not very good at it neither.
Look here
http://php.chek.com/manual/function.preg-replace.php
Good luck.