somewhat complete api

<?php
     require 'simple_html_dom.php';
    include 'group.php';

        function GetMyID(){
                $second_response = Send("http://www.roblox.com/Game/GetCurrentUser.ashx");
                return $second_response;
        }

        function GetMyUsername(){
                $id = GetMyID();
                $fourth_response = Send("http://api.roblox.com/Users/$id");
                $user = json_decode($fourth_response);
                $actualuser = $user->{"Username"};
                return $actualuser;
        }


        function getUsername($id){
                $user_response = Send("http://api.roblox.com/Users/$id");
                $user = json_decode($user_response);
                return $user->{"Username"}?  $user->{"Username"} : "yea um.. that id dosent exist";
        }

        function getID($user){
            $id_response = Send("http://api.roblox.com/users/get-by-username?username=$user");
            $actual_id = json_decode($id_response);
            return $actual_id->{"Id"}?  $actual_id->{"Id"} : "yea um.. that username dosent exist";
        }

        function getRecUser($user){
        return Send("http://www.roblox.com/UserCheck/GetRecommendedUsername?usernameToTry=$user");
        }

        class docScanner extends simple_html_dom {
            function isOnline($id){
                $player_response = Send("http://www.roblox.com/User.aspx?ID=$id");
                $htmlDom = $this->load($player_response);
                $onlineStatus = $htmlDom->getElementById('profile-about-content-text');
                if(strpos($player_response,"UserOnlineMessage") != False or strpos($player_response, "ctl00_cphRoblox_rbxUserPane_UserOnlineStatusHyperLink") != False){
                    return "Online";
                } else {
                    return "Offline";
            }
        }



}

switch($_REQUEST["action"])
    {
    case "getIdFromUser":
    echo ($_REQUEST["userValue"] != null)? getId($_REQUEST["userValue"]) : "Error! No UserId Provided!";
    break;
    case "getUserFromId":
    echo getUsername($_REQUEST["plrId"]);
    break;
    case "getRecommendedUserName":
    echo getRecUser($_REQUEST["suggesteduser"]);
    break;
    case "getMyUser":
    echo GetMyUsername();
    break;
    case "getMyId":
    echo GetMyID();
    break;
    case "checkOnline":
    $scann = new docScanner();
    echo $scann->isOnline($_REQUEST["plrId"]);
    break;
    case "setRank":
        if(!isset($_REQUEST["userId"]))
            die("Error: No user id!");
        $userId = $_REQUEST["userId"];

        if(!isset($_REQUEST["groupId"]))
            die("Error: No group id!");
        $groupId = $_REQUEST["groupId"];

        if(isset($_REQUEST["rankId"]))
        {
            $rankId = $_REQUEST["rankId"];
            $rankValue = GetRankValueFromRankId($groupId,$_REQUEST["rankId"]);
        }
        elseif(isset($_REQUEST["rankValue"]))
        {
            $rankId = GetRankIdFromRankValue($groupId,$_REQUEST["rankValue"]);
            $rankValue = $_REQUEST["rankValue"];
        }
        elseif(isset($_REQUEST["rankTitle"]))
        {
            $rankId = GetRankIdFromRankValue($groupId,$_REQUEST["rankTitle"]);
            $rankValue = GetRankValueFromRankTitle($_REQUEST["rankTitle"]);
        }
        else
            die("Error: No rank specified!");

        if( $rankId == null || $rankValue == null )
            die("Error: No such rank!");

        $currentUserRank = GetUserRankInGroup($groupId,$userId);
        if( $currentUserRank == 0 )
            die("Error: Not in group!");

        if( $rankValue == $currentUserRank )
            die("Error: Already that rank!");
        elseif( $rankValue < $currentUserRank )
            if( isset($_REQUEST["force"]) && $_REQUEST["force"] == "true" )
                if ( ChangeRank($groupId,$rankId,$userId) )
                    die("Ok: Demoted");
                else
                    die("Error: Unknow (login maybe)");
            else
                die("Error: Demotes needs to be forced!");
        else
            if ( ChangeRank($groupId,$rankId,$userId) )
                die("Ok: Promoted");
            else
                die("Error: Unknow (login maybe)");
        break;
    }


?>