Simple Internet Relay Chat PHP

irc.php

<?php

function read_socket($socket)
{
    while($rawData = fgets($socket)) {
        $data .= $rawData;
    }
    return $data;
}

function send_message(string $channel, string $message)
{
    global $irc;
    fprintf($irc, "PRIVMSG #%s :%s\n", $channel, $message);
}

$host = 'irc.freenode.net';
$port = '6667';
$nick = 'Menhera_bot';
$param = 'Linux 127.0.0.1 localhost';
$channel = 'BHSec';

$irc = fsockopen($host, $port, $errno, $errstr, 30);
stream_set_blocking($irc, 0);

if($irc) {
    fprintf($irc, "USER %s\n", $param);
    sleep(5);
    fprintf($irc, "NICK %s\n", $nick);
    echo read_socket($irc);
    sleep(5);
    fprintf($irc, "JOIN #%s\n", $channel);
    echo read_socket($irc);
    sleep(5);

    while(1)
    {
        $msg = readline('IRC: ');
        $msg = trim($msg);

        if(empty($msg)) {
            echo read_socket($irc);
        } else {
            send_message($channel, $msg);
        }
    }
}

fclose($irc);