$gzip = gzcompress($h->inhalt);
header("Content-Encoding: gzip");
print($gzip);
$fp = fopen("/tmp/file.gz","w");
fputs($fp,$gzip);
fclose($fp);

does not work, the browser does not display anything, 
and gzip -d /tmp/file.gz tells me that the file is not
a valid gzip file.

If I do:
     $fp = gzopen ("/tmp/file.gz", "w");
     gzputs($fp,$h->inhalt);
     gzclose($fp);
and then gzip -d again, everything works.

The file generated by gzcompress is about 20 Bytes shorter
than the one from gzopen, so I suspect there is probably 
some problem with NULL-Termination...

TIA,
   Michael