On Fri, Apr 29, 2016 at 1:12 PM, Nikita Popov <nikita....@gmail.com> wrote:

> Hi internals!
>
> I'd like to submit a small RFC for your consideration, which ensures
> something that really ought to be a given already: If you use $this in an
> instance method, you should actually get a $this (and not NULL).
>
>     https://wiki.php.net/rfc/forbid_null_this_in_methods
>
> As this is targeting PHP 7.1, the RFC is careful to retain compatibility
> with certain legacy PHP 4 code patterns.
>

What is the performance cost of inspecting the method for $this, and is
that inspection impervious to tricks that shield $this?

Example:

A::method();
class A {
    public function method() {
        $foo = function () {
            $this->something();
        }
    }
}

Does that throw an \Error?  Would it throw an \Error if $foo() were called?

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