Dynamic invocation supported ?

[henrywood]

Sorry for keeping opening issues, but I an trying to figure out if it would be feasible for me to use KPHP, but it is hard to know what is supported when compilation does not work (See #1045 regarding the compilation problem)

In a CLI application that I need to make KPHP compatible, an App class has this method:

    public function run(array $argv): void
    {
        $key = mb_strtolower($argv[1] ?? 'default'); // Are multibyte functions supported ?

        $findArr = array_filter($this->commands, static fn(Command $cmd): bool => mb_strtolower($cmd->key) === $key);
        $command = array_values($findArr)[0] ?? null;

        if ($command === null && $key === self::HELP_CMD) {
            $this->helper();
            return;
        }

        $command ?? throw new InvalidArgumentException('Command not found.');
        $this->writeAppHeader($command);

        // Handle argv
        $argv = array_splice($argv, 1);
        $context = new Context(
            params: $this->parseParams(
                $command, 
                [
                    'cmd',
                    ...$argv, /* What about variadic arguments ? Are they supported */
                ],
            ),
        );

        if (isset($command->service['handler']) && is_callable($command->service['handler'])) {
            $command->service['handler']($context);
            return;
        }

        if (is_string($command->service['instance'])) {
            $instance = new ($command->service['instance'])(); // Is this syntax supported - I tend to say yes due to #726 being merged ?
        } elseif (is_callable($command->service['instance'])) { // since is_callable() appears to be missing in built-in/functions.txt I guess this won't work or ?
            $instance = $command->service['instance']();
        } else {
            throw new InvalidArgumentException('Invalid service provided to command '.$key);
        }

        if (!method_exists($instance, $command->service['entrypoint'])) {    // What about method_exists() ? Is that supported ?
            throw new InvalidArgumentException('Invalid entrypoint provided to command '.$key);
        }

        $instance->{$command->service['entrypoint']}($context);
    }

Both $command->service['entrypoint'] (a string) - example: 'run' ,
and
$command->service['instance'] (a string such typically produced from Foo::class)
are known at compile-time

Please inform me !

Thanks !