namespace my\foo
{
class MyClass {}
function myFunc() { }
const MY_CONST = 'foo';
}

namespace you\foo
{
class MyException extends \Exception
{
}
}
But the weirdest thing is extends Exception tries to look for Exception in the current namespace and doesnt automatically look for it in the global namespace. This seems to hold for any class in the namespace.

class MyClass extends MyGlobalClass fails to look for MyGlobalClass in the global namespace. We need to explicitly specify \MyGlobalClass