PHP WebSockets Simple TCP/IP server
Example
Minimal example based on PHP manual example found here: http://php.net/manual/en/sockets.examples.php
Create a websocket script that listens to Port 5000
Use putty, terminal to run telnet 127.0.0.1 5000 (localhost).
This script replies with the message you sent (as a ping-back)
<?php
set_time_limit(0); // disable timeout
ob_implicit_flush(); // disable output caching
// Settings
$address = '127.0.0.1';
$port = 5000;
/*
function socket_create ( int $domain , int $type , int $protocol )
$domain can be AF_INET, AF_INET6 for IPV6 , AF_UNIX for Local communication protocol
$protocol can be SOL_TCP, SOL_UDP (TCP/UDP)
@returns true on success
*/
if (($socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
echo "Couldn't create socket".socket_strerror(socket_last_error())."\n";
}
/*
socket_bind ( resource $socket , string $address [, int $port = 0 ] )
Bind socket to listen to address and port
*/
if (socket_bind($socket, $address, $port) === false) {
echo "Bind Error ".socket_strerror(socket_last_error($sock)) ."\n";
}
if (socket_listen($socket, 5) === false) {
echo "Listen Failed ".socket_strerror(socket_last_error($socket)) . "\n";
}
do {
if (($msgsock = socket_accept($socket)) === false) {
echo "Error: socket_accept: " . socket_strerror(socket_last_error($socket)) . "\n";
break;
}
/* Send Welcome message. */
$msg = "\nPHP Websocket \n";
// Listen to user input
do {
if (false === ($buf = socket_read($msgsock, 2048, PHP_NORMAL_READ))) {
echo "socket read error: ".socket_strerror(socket_last_error($msgsock)) . "\n";
break 2;
}
if (!$buf = trim($buf)) {
continue;
}
// Reply to user with their message
$talkback = "PHP: You said '$buf'.\n";
socket_write($msgsock, $talkback, strlen($talkback));
// Print message in terminal
echo "$buf\n";
} while (true);
socket_close($msgsock);
} while (true);
socket_close($socket);
?>
