Stream bcast

sock_receiver.php

<?php

$port = 12345;

$sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP); 
socket_set_option($sock, SOL_SOCKET, SO_BROADCAST, 1); 
socket_bind($sock, '0.0.0.0', $port);

while (1) {
    $r = [$sock];
    $w = $e = $t = null;
    socket_select($r, $w, $e, $t);

    socket_recvfrom($sock, $buf, 1024, 0, $name, $port);
    echo "Received from $name:$port: $buf\n";
}

sock_sender.php

<?php

$message = 'This is a broadcast message!';
$addr = '192.168.49.255';
$port = 12345;

$sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP); 
socket_set_option($sock, SOL_SOCKET, SO_BROADCAST, 1); 
socket_sendto($sock, $message, strlen($message), 0, $addr, $port); 
socket_close($sock);

echo 'sent';

stream_receiver.php

<?php

$port = 12345;

$ctx = stream_context_create([
    'socket' => [
        'broadcast' => true,
    ]
]);

$sock = stream_socket_server("udp://0.0.0.0:$port", $errNo, $errStr, STREAM_SERVER_BIND, $ctx);

while (1) {
    $r = [$sock];
    $w = $e = $t = null;
    stream_select($r, $w, $e, $t);

    $buf = stream_socket_recvfrom($sock, 1024, 0, $addr);
    echo "Received from $addr: $buf\n";
}

stream_sender.php

<?php

$message = 'This is a broadcast message!';
$addr = '192.168.49.255';
$port = 12345;

$ctx = stream_context_create([
    'socket' => [
        'broadcast' => true,
    ]
]);

$sock = stream_socket_client("udp://$addr:$port", $errNo, $errStr, 2, STREAM_CLIENT_CONNECT, $ctx); 
stream_socket_sendto($sock, $message, 0);

echo 'sent';