PHP switch statement variable scope

Question

In PHP, how is variable scope handled in switch statements?

For instance, take this hypothetical example:

$someVariable = 0;

switch($something) {

          


        

Answer 1

PHP does only have a global and function/method scope. So $someVariable inside the switch block refers to the same variable as outside.

But since $something is not defined (at least not in the code you provided), accessing it raises a Undefined variable notice, none of the cases match (undefined variables equal null), $someVariable will stay unchanged and 0 will be printed out.