Minecraft LAN world sender & receiver in PHP

mcast_recv.php

<?php
$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP) or die("Failed to create socket.\n");
socket_set_option($socket, IPPROTO_IP, MCAST_JOIN_GROUP, [
	"group" => "224.0.2.60",
	"interface" => 0
]);
socket_bind($socket, "0.0.0.0", 4445) or die("Failed to bind.\n");
$msg_regex = '/^\[MOTD\]([^\[\]]+)\[\/MOTD\]\[AD\]([0-9]{4,5})\[\/AD\]$/';
while(true)
{
	socket_recvfrom($socket, $msg, 1024, 0, $from, $port);
	if(preg_match($msg_regex, $msg, $matches) === 1)
	{
		echo $matches[1]." available on $from:".$matches[2]."\n";
	}
}

mcast_send.php

<?php
$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP) or die("Failed to create socket.\n");
socket_set_option($socket, SOL_SOCKET, SO_BROADCAST, 1);
$msg = "[MOTD]Hello, I'm definitely a LAN world![/MOTD][AD]25565[/AD]";
socket_sendto($socket, $msg, strlen($msg), 0, "224.0.2.60", 4445);