asking about php codes, a little problem with joining?

Question

$address = '$street' & '$postcode' & '$city' & '$state'; //how to join this? this is not correct. i want to join street, postcode, city and state in 1 variable (address) so i can add a complete address in 1 field.

Answer 1

$address = '$street' . '$postcode' . '$city' . '$state';

"." is the concatanation operator - not "&"

Answer 2

As said, you need . but also when using single quotes (') variables won't be replaced with their values. So either you need to do:

$address = $street . $postcode . $city . $state;

Or use double quotes (no use in this case, but would if you'd want characters in between):

$address = "{$street}{$postcode}{$city}{$state}";

So with characters:

$address = "I live in street $street, my postal code it $postcode in the city $city. My state: $state.";