I think it sets the variable to "none" (hence your 4 chars).

You can check this by echoing out your variable.

Chris.

>Hi again all,
>this code solved my problem
>
>if(strlen($bild1) > 4)
>{
>     ...
>}
>
>Obviously an empty field has a string length of 4 when sent in the 
>header.Therefore it's never empty. Why is that
>anyone know??