wonderful! Thx a lot.
UPDATE:Now, my signature works fantastic and nearly everything is fine. BUT I only get some errors including my signature in some boards, and I know where the problem is.
e.g. vbulletin needs the file-size to allow the including, otherwise it will say "wrong url" or something like that. I've found some topics about this and "dynamic images".
So, how to
find the final file-size to add the header with this:
header('Content-length: 25773');
UPDATE 2:Okay, I got it... but the procedure takes very very long:
$pic = fopen("signature.png","br");
$filesize = filesize ($pic);
header ("Content-Length: ".$filesize);
Maybe there is a better way, cause it takes really seconds of seconds... to long in my opinion.