从路由器获取计数控制器args？

Question

ok im learning on how to make my own custom mvc system, so far i have created things like router and the controller.

example i have a controller profile class and an url www.helloworld.com/args1/args2/args3

class Profiles
{
    function index($args1,$args2)
    {
        echo var_dump($args1,$args2);
    }
}

heres are part of my router class that execute the method and the parms

        if (is_callable(array($controller,$method))) {
            call_user_func_array(array($controller, $method), $this->params);
        }

so far no error but somehow i need to give a 404. if the $this->params is different then the count(params) in the method that i call at call_user_func_array(array($controller, $method), $this->params);

ok what im thinking is if count get params not same as count params at the called class then 404, lets say i can count my $this->params it gave me a 3. but how about the params in the called class ? how can we count params in a called class by call_user_func_array?

Thanks for looking in

Adam Ramadhan

Answer 1

From what I know, there is no way of getting the parameter count for a method without using reflection. However, it's pretty simple and would look something like this:

$reflector = new ReflectionClass('Profiles');
$method = $reflector->getMethod('index');
$parameters = $method->getParameters();

printf('%s expects %d parameters', $method->name, count($parameters));

Will yield

index expects 2 parameter

Note that reflection always comes with a cost. However, the performance implications of this should not be noticable.