I ran into the same problem on a script yesterday.. It turns out that one of
the vars in my mysql_connect() command wasn't assigned.. It gave me no
indication of this so I hadn't thought to look there.. I just happened to be
reading back through the whole page to see what I could find and noticed
that I hadn't set the var at the top..

Something else that I noticed in your code is that there doesn't seem to be
a mysql_select_db() call.. Unless that is somewhere else in the code and
just not shown here, you'll need it I believe..

Just a couple thoughts,

Bob Weaver

"Luke Kearney" <[EMAIL PROTECTED]> wrote in message
> Hello All,
> I am struggling to understand why my query throws an error the code as
> $link = mysql_connect ( "db.localhost.org", $user , $pass );
> if ( ! $link )
>  die ( "Couldn't Connect to Mysql Server" );
>  print "Sucessfully connect to server <p>";
>  $query = "select * from users "
>           ."where screen_name='$screen_name' "
>     ." and passwd=password('$passwd')";
>  $result = mysql_query($query, $link);
>  if (mysql_num_rows($result) >0 )
> When executed you get a little message back like this one
> Warning: Supplied argument is not a valid MySQL result resource in
> /usr/local/share/doc/apache/trial/authmain.php on line 20
> What does this generally mean as I have noted that others use this syntax
> what is my issue ?
> Any help or pointers to references would be most appreciated.
> Thanks
> Luke K

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