problem with fwrite function

I can't write to files on my serveur using the fwrite function. I verified all write access-rights to the directories and there is no problem. When using ftp I can place files on my serveur (no problem by this way). I don't have any problem to access files with " fgets " reading stuff from files on my providers sever. Here the example program I used : <? $test_str = "test" $send_file = "http://www.my-serveur-name/test.htm"; $file1 = fopen("$send_file", 'w'); fwrite($file1, "test_str"); fclose($file1); ?> What is the problem? The function ftp-connect and the other " ftp_..." functions aren't unfortunately supportet so that I have to exclude this way to copy files on my server! Thanks for your remarks and helping. Didi