Nix shell for PHP development

example.bash

nix-shell --run 'composer install'

nixpkgs.nix

let
    tarball = fetchTarball {
        url = "https://releases.nixos.org/nixpkgs/nixpkgs-22.05pre369766.3e242938104/nixexprs.tar.xz";
        sha256 = "1lk15ww5m4njd51286ypawpdrz25499sp01fhiil9byzjnp4xm0f";
    };
in
    import tarball { }

shell.nix

let
    nixpkgs = import ./nixpkgs.nix;

    # Configure which PHP version and extensions you want.
    php = nixpkgs.php81.withExtensions phpExtensions;
    phpExtensions = { all, ... }: [
        all.curl
        all.filter
        all.mbstring
        all.openssl
    ];
in
    nixpkgs.mkShell {
        nativeBuildInputs = [
            php
            php.packages.composer

            # Can also include other tools:
            nixpkgs.cucumber  # if using cucumber
            nixpkgs.perl      # if using prove
            nixpkgs.firefox   # if using firefox in CI for testing? idk
        ];
    }