Re: [PHP-DEV] [Concept] Flip relative function lookup order (global, then local)

[Stephen Reay]

> On 24 Aug 2024, at 01:29, Ilija Tovilo <tovilo.il...@gmail.com> wrote:
> 
> The "hard to come by" part is referring to the engine, which is quite
> optimized for the current semantics. Some of PHPs quirky semantics
> make it hard to improve it further, this being one of them.

Thanks for clarifying. Out of curiosity, how much optimisation do you imagine 
would be possible if the lookups were done the same was as classes (ie no 
fallback, names must be local, qualified or imported with `use`)?

I am aware this is a BC break. But if it's kosher to discuss introducing a 
never ending BC break I don't see why this isn't a valid discussion either. It 
would give *everyone* that elusive 2-4% performance boost, would resolve any 
ambiguity about which function a person intended to call (the claimed security 
issue) and would bring consistency with the way classes/etc are referenced. 

Cheers

Stephen