Allow for consistent syntax when including an array of parameters in Laravel's app() helper function when the concrete binding is a Closure.

closureBinding.php

<?php

if (!function_exists('function_binding')) {
    /**
     * @param callable $callback
     * @return callable
     */
    function function_binding(callable $callback): callable
    {
        $params = app(ReflectionFunction::class, ['name' => $callback])->getParameters();

        /** @var ?ReflectionParameter $firstArg */
        $firstArg = array_shift($params);
        $firstArgType = $firstArg ? (string)$firstArg->getType() : null;
        $firstArgName = $firstArg ? $firstArg->getName() : null;
        $expectsContainer = is_subclass_of($firstArgType, Container::class) || !$firstArgType && $firstArgName == 'app';
        !$expectsContainer && $firstArg && array_unshift($params, $firstArg);

        $params = array_map(function (ReflectionParameter $parameter) {
            return $parameter->getName();
        }, $params);

        return function (Container $app, $args = [], ...$additionalArgs) use ($callback, $params, $expectsContainer) {
            $args = !is_array($args) || !empty($additionalArgs) ? array_merge((array)$args, $additionalArgs) : $args;

            if ($numArgs = count($args)) {
                $expectedArgKeys = array_slice($params, 0, $numArgs, true);
                $numExpected = count($params);
                $noMore = array_slice($args, 0, $numExpected, true);
                $noLess = array_pad($noMore, $numExpected, []);
                $namedArgs = array_is_numeric($noLess) ? array_combine($expectedArgKeys, $noLess) : $noLess;
                $keyOrder = array_flip($expectedArgKeys);
                $args = array_merge($keyOrder, $namedArgs);
            }

            $expectsContainer && array_unshift($args, $app);

            return $callback(...array_values($args));
        };
    }
}