NodeJS server (bits have been removed for clarity)

console.log("Starting server...");

//config and variables
var serverPort = 8080;
var connectCounter = 0;
var adminSessions = [];
var updater_msDelay = 1000 * 60;
var updater_dailymotionID = "x1ulpje";

//libs
var io = require("socket.io")(serverPort);
var mysql = require("mysql");
var http = require("http");
var https = require("https");
var memcached = require("memcached");
var phpunserialize = require("php-unserialize");
var cookie = require("cookie");
var util = require('util');

var sessions = new memcached("localhost:11211");
sessions.on('failure', function(details) {
    console.log("Error while connecting to PHP sessions manager. error: " + details);
    return -1;
});

//events
var Manager = new ClientEventsManager(io);

console.log("Server started");



process.on('exit', function(code) {
    console.log("Server shutting down with code " + code + "...");
    db.destroy();
    sessions.end();
});



/******************************************************************************/
//functions
function getJSON(options, onResult) {
    var prot = options.port == 443 ? https : http;
    var req = prot.request(options, function(res) {
        var output = '';
        res.setEncoding('utf8');
        res.on('data', function(chunk) {
            output += chunk;
        });
        res.on('end', function() {
            try {
                var obj = JSON.parse(output);
                onResult(res.statusCode, obj);
            } catch (e) {
                console.log("Invalid response returned from "+options.host+options.path+":"+options.port+":\n"+output);
            }
        });
    });
    req.on('error', function(err) {
        console.log("Error in http request to " + options.host + " : " + err);
    });
    req.end();
}

function isAuthentified(socket, Yep, Nope) {
    console.log("Trying to retrieve data...");
    socket.send("Your PHP session id: "+Manager.clients[socket.id].PHPSESSID+", right?");
    sessions.get(Manager.clients[socket.id].PHPSESSID, function(err, data) {
        if (err) {
            console.log("err");
            Nope();
        }
        if (data) {
            console.log("data OK");
            var SessionData = PHPunserialize.unserializeSession(data);
            console.log(util.inspect(SessionData, null));
            if (SessionData.authentified) {
                console.log("auth ok");
                Yep();
            } else {
                console.log("no auth");
                Nope();
            }
        } else {
            console.log("data not ok: "+data);
            Nope();
        }

    });
}

/******************************************************************************/
//classes
function ClientEventsManager() {
    var EventsManager = this;

    this.clients = [];
    this.clientsCount = 0;
    this.onClientConnection = function(socket) {
        var PHPSESSID = cookie.parse(socket.request.headers.cookie).PHPSESSID;
        socket.emit("info", PHPSESSID);
        EventsManager.clientsCount++;
        EventsManager.clients[socket.id] = {};
        EventsManager.clients[socket.id].PHPSESSID = PHPSESSID;
        isAuthentified(socket, function() {
            socket.emit("authentified", true);
        }, function() {
            socket.emit("authentified", false);
        });
    };
    this.onClientDisconnection = function(socket) {
        delete EventsManager.clients[socket.id];
        EventsManager.clientsCount--;

        //remove the client from the sendConnectedClientsOnUpdate array (if he is in)
        if (EventsManager.sendConnectedClientsOnUpdate.indexOf(socket) > -1) {
            EventsManager.sendConnectedClientsOnUpdate.splice(EventsManager.sendConnectedClientsOnUpdate.indexOf(socket), 1);
        }
    };

    this.createEventReceivers = function() {
        io.sockets.on('connection', function(socket) {
            EventsManager.onClientConnection(socket);
            socket.on('disconnect', function() {
                EventsManager.onClientDisconnection(socket);
            });

        });
    };

    this.createEventReceivers();
}