if ($_SERVER["REQUEST_METHOD"] == "POST")
{
    outSubmitSuccessful();
}
else
{
    outForm();
}

2.0 A
2.1 B
2.2 C
2.3 D
2.4 E
2.5 F
2.6 G
2.7 H
2.8 I
2.9 J
3.0 K
3.1 L
3.2 M
3.3 N
3.4 O
3.5 P
3.6 Q
3.7 R
3.8 S
3.9 T
4.0 U

class MeshRenderingSystem : ISystem
{
    public void OnUpdate(List<Entity> entityList) { }

    public void OnRender(List<Entity> entityList)
    {
        DrawMeshes(entityList.FindAll(x => x.GetComponent("mesh") != null));
    }

    private void DrawMeshes(List<Entity> meshes)
    {
        for (int i = 0; i < meshes.Count; i++)
        {
            Mesh mesh = (Mesh)meshes[i].GetComponent("mesh");

            //draw logic
        }
    }
}

class MeshRenderingSystem : ISystem
{
    private Engine engine;
    private List<Entity> meshCache;

    public MeshRenderingSystem(Engine engine)
    {
        this.engine = engine;
        meshCache = new List<Entity>();
    }

    public void OnUpdate(List<Entity> entityList)
    {
        if (engine.Flags.ContainsKey("meshesChanged") && engine.Flags["meshesChanged"])
            UpdateCache(entityList);
    }

    public void OnRender(List<Entity> entityList)
    {
        DrawMeshes(meshCache);

$varStuff = "stuff";
$varStiff = 'stiff';

$varStaff = "$varStuff is not" + '$varStiff';

echo $varStaff; // prints out: stuff is not $varStiff

$strInput = "<p>Server Name: <input type='text' name='ftp_servername' placeholder='ftp.myserver.com' value='$ftp_servername'\/><\/p>";
echo $strInput;