Why check both isset() and !empty()

Question

Is there a difference between isset and !empty. If I do this double boolean check, is it correct this way or redundant? and is there a shorter way

Answer 1

isset() tests if a variable is set and not null:

http://us.php.net/manual/en/function.isset.php

empty() can return true when the variable is set to certain values:

http://us.php.net/manual/en/function.empty.php

To demonstrate this, try the following code with $the_var unassigned, set to 0, and set to 1.