steamid

<html><body>
<?php

//http://steamcommunity.com/profiles/123
//http://us3.php.net/bc

//http://www.joe.to/moo/sid_convert.php

//ini_set('error_reporting', E_ALL);
//ini_set('display_errors', 1);

set_time_limit(3);

//http://forums.alliedmods.net/showthread.php?t=60899
function GetFriendID($pszAuthID)
{

    $iServer = "0";
    $iAuthID = "0";

    $szAuthID = $pszAuthID;

    $szTmp = strtok($szAuthID, ":");

    while(($szTmp = strtok(":")) !== false)
    {
        $szTmp2 = strtok(":");
        if($szTmp2 !== false)
        {
            $iServer = $szTmp;
            $iAuthID = $szTmp2;
        }
    }
    if($iAuthID == "0")
        return "0";

    $i64friendID = bcmul($iAuthID, "2");

    //Friend ID's with even numbers are the 0 auth server.
    //Friend ID's with odd numbers are the 1 auth server.
    $i64friendID = bcadd($i64friendID, bcadd("76561197960265728", $iServer));

    return $i64friendID;
}
function GetAuthID($i64friendID)
{
    $tmpfriendID = $i64friendID;
    $iServer = "1";
    if(bcmod($i64friendID, "2") == "0")
    {
        $iServer = "0";
    }
    $tmpfriendID = bcsub($tmpfriendID,$iServer);
    if(bccomp("76561197960265728",$tmpfriendID) == -1)
        $tmpfriendID = bcsub($tmpfriendID,"76561197960265728");
    $tmpfriendID = bcdiv($tmpfriendID, "2");
    return ("STEAM_0:" . $iServer . ":" . $tmpfriendID);
}

function AtoF_callback($matches)
{
    return '<a href="http://steamcommunity.com/profiles/'.GetFriendID($matches[0]).'">'.$matches[0].'</a>';
}

function FtoA_callback($matches)
{
    $trimmed = trim($matches[0], ":]'\"");
    return GetAuthID($trimmed);
}

if(isset($_POST['message']) && strlen($_POST['message']) > 0)
{
    $message = $_POST['message'];

    $message = htmlentities($message);

    $message = preg_replace_callback("/STEAM_\d*:\d*:\d*/i",
                "AtoF_callback", $message);

    $message = preg_replace("/\n/","<br>",$message);
    echo $message;

}

if(isset($_POST['message2']) && strlen($_POST['message2']) > 0)
{
    $message = $_POST['message2'];

    $message = htmlentities($message);

    $message = preg_replace_callback("/:\d*\]/",
                "FtoA_callback", $message);

    $message = preg_replace("/\n/","<br>",$message);
    echo $message;

}

?>

<form style="display: inline;" action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" target="_self">
<p>
SteamID to link<br><textarea name="message" wrap=""></textarea><br>
FriendID(format :N] ) to SteamID, use src of group front page<br><textarea name="message2" wrap=""></textarea><br>
</p>
<input type="submit">
</form>

</body></html>