Globals and Registering Variables

[Stevenness]

1.

$bar = 'blah';
$ness.$bar = 'foo';
echo $nessblah;

-------------OUTPUT-------------
foo

//Can I do that?

---

2.
/ Database Constructors /
class Database {

global $db;

function connect($db) {
global $sli = 'yi';
echo $db;
//Do stuff
}
function disconnect($db) {
echo $sli;
echo $db;
//Do stuff

}

Can I do the two bold things?

Thanks,

Steven

[kitchin]

1. Try it. Also try $bar2= "ness$bar"; echo $$bar2;
2. Try it. Also try var_dump($db);