using duty prototypes boldly php

i'm minute make php where parser determins duty dynamically, kind this:

// construction call
$function_call_spec = array( "prototype"  => "myfunction", 
                             "parameters" => array( "first_par"  => "hello",
                                                    "second_par" => "world"));

// dispatch
$funcprototype = $function_call_spec["prototype"];
$funcprototype(); // here duty 'myfunction'.

this glorious dandy. nonetheless comes unbroken step, flitting parameters, i don't unequivocally know it's illusory proceed i wish it. never stops surprising me however book languages days, here goes:

one pass parameters duty this:

// here duty 'myfunction' array parameters.
$funcprototype( $function_call_spec["parameters"] );

however, i wish announce 'myfunction' morally pristine arguments etc:

function myfunction( $first_par, $second_par )
{

}

the doubt following follows - there any proceed pass parameters duty boldly simply looping by parameter array?

to clarify, i don't wish this:

$funcprototype( $function_call_spec["parameters"]["first_par"],
                $function_call_spec["parameters"]["second_par"]  );

because requires formula statically know sum myfunction, goes opposing whole idea.

instead i wish proceed maybe:

// special incantation php duty used invoking functions dynamically
invokefunction( $funcprototype, $function_call_spec["parameters"] );

which following law myfunction being called parameters array gets upheld any sole parameter non-static prototype.

any comments welcome.

regards.

/r

ps: zero formula post tested typos etc.