Description:
------------
---
From manual page: http://www.php.net/language.generators.syntax
---

The note box at the top says, "An empty return statement is valid syntax within a 
generator, but meaningless and will do nothing."

But in fact, an empty return statement is meaningful and does something. It exits 
the generator function and stops yielding.




Test script:
---------------
// this yields 5 and 6 but not 7
function foo() {
    yield 5;
    yield 6;
    return;
    yield 7;
}

foreach (foo() as $x) { echo "$x\n"; }