Insert/Auto Delete Users Online

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    Insert/Auto Delete Users Online

    0. See demo at the front page of Mfws.Ro
    1. Create a file, named online.dat and give permission 666
    2. Create a file, named online.php and give permission 644
    online.php
    PHP Code:
    <?php
    $expire 
    900//seconds
    $dbfile "online.dat";
    if(!
    is_writable($dbfile))
    {
    die(
    "Data file ".$dbfile." is not writable");
    }
    if(!
    file_exists($dbfile))
    {
    die(
    "Data file ".$dbfile." was not found");
    }
    function 
    netip()
    {
    if(!empty(
    $_SERVER["HTTP_CLIENT_IP"]))
    {
    $ip $_SERVER["HTTP_CLIENT_IP"];
    }else if(!empty(
    $_SERVER["HTTP_X_FORWARDED_FOR"]))
    {
    $ip $_SERVER["HTTP_X_FORWARDED_FOR"];
    }else{
    $ip $_SERVER["REMOTE_ADDR"];
    }
    return 
    $ip;
    }
    function 
    counter()
    {
    global 
    $dbfile$expire;
    $cur_ip netip();
    $cur_time time();
    $dbary_new = array();
    $dbary unserialize(@file_get_contents($dbfile));
    if(
    is_array($dbary))
    {
    while(list(
    $user_ip$user_time) = each($dbary))
    {
    if((
    $user_ip != $cur_ip) && (($user_time $expire) > $cur_time))
    {
    $dbary_new[$user_ip] = $user_time;
    }
    }
    }
    $dbary_new[$cur_ip] = $cur_time;
    $fp fopen($dbfile"w");
    fputs($fpserialize($dbary_new));
    fclose($fp);
    $out sprintf("%02d"count($dbary_new));
    return 
    $out;
    }
    $online counter();
    echo 
    date("D, d.m.Y - H:i:s")."\n";
    echo 
    "<br/>\n";
    echo 
    "Now: <b>".$online."</b>,\n";
    echo 
    "You: <b>".netip()."</b>\n";
    ?>
    3. Create a file, named index.php and insert this code after <body>
    index.php
    PHP Code:
    include("online.php"); 
    or
    PHP Code:
    <?php
    include("online.php"); 
    ?>
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