Re: [RFC][Under discussion] Deprecate ${} string interpolation

This RFC is confusing two different things: 1. variables inside strings (options 1, 2, 3) 2. dynamic variables names (option 4) The 4th one is very useful. $v = ${'param_' . $name}; There is no other practical way to do that, so removing that feature would mean breaking something useful with no replacement. Also why break something that works and is used? If it feels too confusing, you could just deprecate use of the "${...}" syntax inside strings, but still I don't feel like it's very confusing and would bring more hassle that it's worth (a bit like the 8.1 depreciation of null for string functions, it's such a pain to deal with).