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?
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