Are these the same?

[Nik]

$name=$_Post['name'];
echo "Hello, Sname";

and this also the same

$name=$_Post['name'];
echo "Hello, " .Sname;

???

[rIkLuNd]

I don't know what you're trying to do, but I would do like this:

$name=$_POST['name']; 
echo "Hello, ".$name;