Possible coment style chat?

pent.php

<?php
$socket = stream_socket_server ('tcp://0.0.0.0:2000', $errno, $errstr);
stream_set_blocking($socket, 0);
$base = event_base_new();
$event = event_new();
event_set($event, $socket, EV_READ | EV_PERSIST, 'ev_accept', $base);
event_base_set($event, $base);
event_add($event);
event_base_loop($base);

$GLOBALS['connections'] = array();
$GLOBALS['buffers'] = array();

function ev_accept($socket, $flag, $base) {
    static $id = 0;
    
    $connection = stream_socket_accept($socket);
    stream_set_blocking($connection, 0);
    
    $id += 1;
    
    $buffer = event_buffer_new($connection, 'ev_read', 'ev_write', 'ev_error', $id);
    event_buffer_base_set($buffer, $base);
    event_buffer_timeout_set($buffer, 30, 30);
    event_buffer_watermark_set($buffer, EV_READ, 0, 0xffffff);
    event_buffer_priority_set($buffer, 10);
    event_buffer_enable($buffer, EV_READ | EV_PERSIST);
    event_buffer_set_callback($buffer, 'ev_read', 'ev_write', 'ev_error');
    
    // we need to save both buffer and connection outside
    $GLOBALS['connections'][$id] = $connection;
    $GLOBALS['buffers'][$id] = $buffer;
}

function ev_error($buffer, $error, $id) {
    event_buffer_disable($GLOBALS['buffers'][$id], EV_READ | EV_WRITE);
    event_buffer_free($GLOBALS['buffers'][$id]);
    fclose($GLOBALS['connections'][$id]);
    unset($GLOBALS['buffers'][$id], $GLOBALS['connections'][$id]);
}

function ev_write($buffer, $id) {
    $mysqli = new mysqli('localhost', 'root', 'pass', 'movies');
    /* If we have to retrieve large amount of data we use MYSQLI_USE_RESULT */
    if ($result = $mysqli->query("SELECT * FROM movies_movie", MYSQLI_STORE_RESULT)) {
        while ($row = $result->fetch_assoc()) {
            //printf ("%s (%s)\n", $row["id"], $row["title"]);
        }
        $result->close();
    }
    $mysqli->close();
    echo microtime(1), " do it write", PHP_EOL;
    // Close
    //event_buffer_disable($GLOBALS['buffers'][$id], EV_READ | EV_WRITE);
    //event_buffer_free($GLOBALS['buffers'][$id]);
    //fclose($GLOBALS['connections'][$id]);
    //unset($GLOBALS['buffers'][$id], $GLOBALS['connections'][$id]);
}

function ev_read($buffer, $id) {
    while ($read = event_buffer_read($buffer, 256)) {
        //var_dump($read);
    }
    event_buffer_write($buffer, "HTTP/1.1 200 OK");
    event_buffer_write($buffer,
      "\r\nContent-Type:text/html" .
      "\r\nContent-Length: 4" .
      "\r\n\r\nPONG");
}
?>