Untitled

<?php
class server_status {

    public $servers = array();
    public $server;
    public $settings = array();

    /**
    * Starts the Process of display the server status
    *
    * Gets the parameters passed and assignes them to variables
    *
    * @param void
    * @return NULL
    */
    public function start()
    {
        $_GET['server'] = strtolower($_GET['server']);
        $this->server = array_key_exists($_GET['server'], $this->servers) ? $this->servers[$_GET['server']] : die('SERVER NOT FOUND');
        $this->server['name'] = $_GET['server']; //Just so it's a little easier giving it a name :)
        if($_GET['text']) $this->settings['text'] = $_GET['text'];

        $this->display();
    }

    /**
    * Makes a connection to the server to see if it is online and responding
    *
    * @param void
    * @return boolean 1 or 0
    */
    public function checkServer()
    {
        if(!$this->server['offline']){
            $check = @fsockopen($this->server['ip'], $this->server['port'], $errnum, $errstr, 2) ? 1 : 0;
        }else{
            $check = 0;
        }
        return $check;
    }

    /**
    * Gets the status of the server from the cache, or if expired re-makes connection and cache's again
    *
    * @param void
    * @return boolean 1 or 0
    */
    private function getStatus()
    {
        $fullpath = $this->settings['fullpath'];
        $cachefile = $this->server['offline'] == FALSE ? $fullpath."cache/".$this->server['name'].".txt" : $fullpath.'cache/offline.txt';
        $cachetime = 5 * 60; // 5 minutes
        // Serve from the cache if it is younger than $cachetime
        if ((file_exists($cachefile) && (time() - $cachetime < filemtime($cachefile))) or $this->server['offline'])
        {
            $this->logger('Loading from cache');
            $this->logger('Loading File', $cachefile);
            $file = fopen($cachefile, 'r');
            $contents = fread($file, filesize($cachefile));
            $this->logger('File contents', $contents);
            $json = json_decode($contents, 1);
            $online = $json['online'] ? 1 : 0;

            $this->logger('JSON Array', print_r($json, true));
            $this->logger('Online Status', $online);
            $this->logger("Cached",date('jS F Y H:i', filemtime($cachefile)));
        }else{
            $this->logger("Writing Cache File");

            $arr = array(); //ARRRGH PIRATES

            $check = $this->checkServer();
            $online = $arr['online'] = $check;

            $this->logger('Online Status', $online);
            $this->logger("Array List", print_r($arr, true));
            $this->logger("Json encoded", json_encode($arr));

            if (is_writable($cachefile) or true) {
                if (!$handle = fopen($cachefile, 'w+')) {
                    $this->logger("Cannot open file ($cachefile)");
                    exit;
                }
                if (fwrite($handle, json_encode($arr)) === FALSE) {
                    $this->logger("Cannot write to file ($cachefile)");
                    exit;
                }
                $this->logger("Success, wrote ($cachefile) to file ($cachefile)");
                fclose($handle);
            } else {
                $this->logger("The file $cachefile is not writable");
            }
        }
        return $online;
    }

    /**
    * Displays the image
    *
    * $param void
    * @output image png or text
    * @return NULL
    */
    private function display()
    {
        $online = $this->getStatus();

        $this->logger('Display Online status', $online);

        //OUTPUT TIME BABY!!
        header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
        $time = date('r', time() + 300); //Time in 5 minutes from now
        header("Expires: $time");
        //header("Expires: Tue, 23 Jul 1994 08:00:00 GMT"); // Date in the past
        if(!$this->settings['text']){
            header("Content-type: image/png");
            if($online){
                readfile($this->settings['fullpath'].$this->server['name'].'-on.png');
            }else{
                readfile($this->settings['fullpath'].$this->server['name'].'-off.png');
            }
        }else{
            if($online){
                $color = "green";
            }else{
                $color = "red";
            }
            $text = (!$online) ? "OFFLINE": "ONLINE";
            echo "<font style='color:$color'>$text</font>";
        }
    }

    /**
    * When the debug parameter is true when loading the &text=true variable, it will output extra information
    *
    * @param string $item
    * @param string $text
    * @return NULL
    */
    private function logger($item, $text = '')
    {
        if($this->settings['debug'] == TRUE)
        {
            echo "$item : $text <br /><br />\n\n";
        }
    }
}

    $status = new server_status();
    $status->settings['debug']      = FALSE; //Returns extra informations only viewable if &text=true
    $status->settings['fullpath']   = ""; //full path to this script including /

    /**
    * List servers in an array
    *
    * Format is: 'SERVER NAME' => array('ip' => '', 'port' => ''),
    * There is an additional " 'offline' => true " if you would like to be able to display a server that is not online or you want to force it to show offline
    *
    * NOTE: you will need images corresponding to <server_name>-on.png and <server_name>-off.png in the script path.
    */
    $status->servers = array(
        'server_name'   => array('ip' => '', 'port' => ''),
        'server_2'   => array('ip' => '', 'port' => '')
    );

    $status->start();
?>