How can i stop people putting spaces in their nickname?

[-Ice-php]

Hey
i have a form and when they input their usename.
How can i stop them from putting spaces in their name (not really stop them just echo name cannot contain spaces) ?
Thanks

[pippo]

Hi,

one way could be:

<?php
$my_string = "this is my nick name";

if ( preg_match( "/\\s/", $my_string ) )
{
    print "Sorry, but the name cannot contain spaces!!!";
}
?>

[-Ice-php]

Thanks
Works Great