Pagekit\Installer\Controller\PackageController::installAction PHP Method

    public function installAction($package = [], $packagist = false)
    {
        return App::response()->stream(function () use($package, $packagist) {
            try {
                $package = App::package()->load($package);
                if (!$package) {
                    throw new \RuntimeException('Invalid parameters.');
                }
                $this->manager->install([(string) $package->getName() => $package->get('version')], $packagist);
                echo "\nstatus=success";
            } catch (\Exception $e) {
                printf("%s\nstatus=error", $e->getMessage());
            }
        });
    }