RE: [PHP] "Byte Array"

To view the terms under which this email is distributed, please go to http://disclaimer.leedsmet.ac.uk/email.htm > -----Original Message----- > From: Ian Firla > Sent: 14/12/04 17:52 > > On Tue, 2004-12-14 at 08:40 -0800, Richard Lynch wrote: > > Ian Firla wrote: > > > > > > Just a follow-up to myself... I decided to try packet sniffing to see > > > what was going on and ettercap confirms that I'm sending out strings > > > rather than data of the type stored in my array: > > > > > > 16:12:26 192.168.0.101:32779 --> 192.168.0.88:32896 | UDP | > > > > > > 0000: 3331 31 > > > > > > That "31" should be an integer of only one byte, not two. > > > > I suspect that PHP is converting your integers into strings at some > point, > > as you build the array... > > > > *WHERE* it is doing that is difficult to say, without seeing more code. It's not at all difficult. The definition of fwrite is: int fwrite (resource handle, string string [, int length]) So the second parameter is converted to a string as it passes in to fwrite. This is not at all unexpected -- it's kind of the file(/stream/whatever) analogue of echo or print. To get what you really want -- i.e. a 1-byte binary representation of your value -- you'll have to encode it as the appropriate character and then send that. Two possible ways to do that are with pack() and chr(). Cheers! Mike