[Resolved] eregi_replace problem

[fuzic]

$user1 = ereg_replace([^a-z 0-9], '', $user);

$user is defined from a form that sends data to this script. Every time the script is called, I get the error:

Parse error: parse error, expecting `')''

What I'm actually trying to do is have the script remove all characters except the ones specified in the ereg expression. I was following another post I found in the forums here, so this might be entirely wrong.
Thanks in advance

[olaf]

use this:

$user1 = ereg_replace("[^a-z 0-9]", "", $user);