Re: binary data over UDP with PHP?

Thanks for the feedback. As it turns out, the reason I was getting zero data bytes in my UDP packet was that I had declared the packet variable outside the function in which I was using it. $packet = chr(0x01).chr(0x1d).... etc function doSomething($x) { // using $packet in here gives you an empty variable. } So I guess it was a very basic PHP language thing I was running into. Guess I've done too much Perl and assumed the variables were accessible in the function. :-) "Keith Greene" <hitek@cox.net> wrote in message news:6.1.1.1.0.20040707170321.01dda740@pop.west.cox.net... > I use the following without problem: > > $fp = fsockopen("udp://www.server.com", 24250, &$errno, &$errstr, .2); > if (!$fp) { > $status = "Server not available"; > } else { > $trigger = > > chr(hexdec('FF')).chr(hexdec('FF')).chr(hexdec('01')).chr(hexdec('00')); > fwrite($fp,$trigger); # Send trigger to the > status server > $junk = fread($fp, 4); # discard echoed command > from status server > } > > Keith > > At 04:23 PM 7/7/2004, coder_1024 wrote: > >I'm trying to send some binary data to a UDP server using PHP. The examples > >I've been able to find show sending binary data over TCP, or they show > >sending text over UDP. > > > >I'm constructing the messages using the below: > > > > $text_msg = "Hello, World\r\n"; > > $binary_msg = chr(0x01).chr(0x02).chr(0x00).chr(0xAD); > > $binary_msg_size = 4; > > > >I've tried a couple methods of sending the data: > > > > $fp = fsockopen("udp://" . $host,$port,....); > > fwrite($fp,$binary_msg,$binary_msg_size); > > > >and > > > > $sock = socket_create(AF_INET,SOCK_DGRAM,SOL_UDP); > > socket_sendto($sock,$binary_msg,$binary_msg_size,0,$host,$port); > > > >In either case, a UDP packet is sent, but with a zero data size. If I > >instead send the $text_msg, it works as expected. For some reason sending > >the binary data doesn't work. > > > >Does anyone have insight into how to send binary data over UDP using PHP? > > > >-- > >PHP General Mailing List (http://www.php.net/) > >To unsubscribe, visit: http://www.php.net/unsub.php