Writing a simple statement with an index

[makamo66]

I can write this and get the right results:

 

if ( $_SESSION['addId'] == 'add[4]' )

$productId = 1;

if ( $_SESSION['addId'] == 'add[5]' )

$productId = 2;

if ( $_SESSION['addId'] == 'add[6]' )

$productId = 3;

 

But if I try to streamline it by writing it this way, it doesn't work:

 

if ( $_SESSION['addId'] == 'add[$i]' )

$productId = $i;

 

I think the two methods should be equivalent so why doesn't the second way work?

[trq]

Variables are not interpolated within single quotes.