SPL Debug: 42
SPL Debug: Variable 'foobar' not found.
SPL Debug: I am 'foobar' from object A.
SPL Debug: Foobar from object 'A'.
SPL Debug: Barfoo from function test3().
SPL Debug: Foobar from object 'B'.
SPL Debug: Barfoo from function test3().
SPL Debug: Foobar from object 'B'.
SPL Debug: Barfoo from root context.