PHP : NIL VAR

$nilai1=12; //tipe data integer
$nilai2=8.99; //tipe data float atau double
$nilai3= "Tes nilai variabel string"; //tipe data string

print "Tipe data integer : $nilai1
";
print "Tipe data double : $nilai2
";
print "Tipe data string : $nilai3 ";
?>

$namavariabel=nilai data