Php How to put a variable with in a variable

Question

I have this code:

echo $b1[1][wood];   // It would say 100

But i want to change the 1 in $b1, for example:

$id = 1;
echo $b(The $id here)[1][wood];

I tried

echo $b'.$id.'[1][wood];  

But it didnt work. Does any one have any suggestions ?

Thanks

Answer 1

Try this:

$id = 1;
echo ${'b'.$id}[1]['wood'];