lsp-mode VS vscode-intelephense

I also tried to the solutions suggested  and , but nothing worked. I moved the (setq lsp-keymap-...) line outside (and before) use-package. I also used :config (define-key lsp-load-map...) in my use-package block. But none of them worked.

Not sure how much this might help, but lsp-mode has lsp-yaml-select-buffer-schema and lsp-yaml-set-buffer-schema commands to pick schema from a list or set from a URI. Checking the source of them might give some hints about how the same could be implemented in eglot?

Beyond that you might as well embrace the suck and install autex with a language server: https://emacs-lsp.github.io/lsp-mode/

Smart completion these days is done primarily through LSP. eglot is fairly minimal but built-in as of 29, also available via GNU Elpa. lsp-mode is another option with more integrations and a bit more fleshed out.

lsp-mode: https://github.com/emacs-lsp/lsp-mode/issues/2080

Are you running emacs-29? It has numerous speed-ups compared to emacs-28 and older versions, many of them coded by Mattias Engdegård, e.g. commit def6fa4246. I have a fresh build of emacs-29 running on Linux and a new mac with an M1 CPU, and it's stupid fast. I don't use the native-comp feature. I rarely notice any hesitation or slowness. I don't use Elpy. I do use lsp mode.

Since you are doing code development, the first things to go for would be setting up your emacs packaging (installing use-package and melpa (use-package's documentation covers this) so you have more packages to choose from (do be careful to not just pick things willy nilly but research them a bit first)) and then setting up lsp-mode. lsp-mode lets you use LSP servers for the specific programming languages you work with in a somewhat unified fashion. You then need to install and setup the LSP servers for the languages you use, and possibly install language specific Emacs packages as support (note, Emacs has builtin functionality for many).

And first of all, I'm trying to understand, how is it connected to https://github.com/emacs-lsp/lsp-mode? I'm sure, that existed lsp implementations already parse source code. Why TreeSitter?

I'm going to use intelephense to show the minimal configuration needed to setup a language server in Neovim.

This is the most important extension to install for PHP support. It provides a fast language server that adds code completion, go to definition, formatting, and more. You can also purchase a license at Intelephense, which I highly recommend. It adds some additional features like renaming symbols and other code actions.

You need to get the code, and use an IDE to help like vs code + PHP Intelephense (https://intelephense.com/)

I bought a license key to Intelephense https://intelephense.com/, and added the key as described in the documentation and several blog posts (at least I think I'm doing it right), however the paid features (e.g. rename symbol) don't work.

I'm quite happy with Emacs, coming from PhpStorm, using intelephense.com premium. I highly recommend.

Follow this guide to configure and add PHP Intelephense.

The error itself is the VSCode extension Intelephense, that is usually very helpful when writing PHP in VSCode, telling you that there is an error with an Undefined type ... after you have followed the steps outlined here in detail to install the permissions package on your Laravel app.

Furthermore, depending on which integrated development environment (IDE) you use, your editor detects the strict_types and warns you inside the editor before running your code. For example, I use the Intelephense extension inside Visual Studio Code, which warns me about wrong parameters before I run the code, like so:

Helix should use Intelephense by default, so if you install that, it should work out of the box. You can find installation instructions here 🙂

Look at either Intelephense or Devsense as plugins and you'll get a close to IDE level experience.