Making table name equal variable

Hello I was wondering if you might be able to help. I was wondering how I would make a table name equal a variable.

I have this

if ($display == "Premiums")
{
$premiums2='Premiums2'
$query2 "Select * from $premiums2";
}


but it does not seem to work, and I get the following error

Parse error: parse error, unexpected T_VARIABLE

missing ; on the first line inside the if-block.
[edit] and a missing = on the other line.