WIPDispatch.php

<?php


class B {
    
    public static function A(int $a, int $b = NULL) {
        return 5;
    }
    
    public static function C(int $a, string $hey) {
        
        return 2;
    }
}


function argument_list(callable $callable, $input) : array {
    
    $params = (new ReflectionMethod(...$callable))->getParameters();
        
    $args = [];
    $i = 0;
    foreach ($params as $param) {
        $name = $param->getName();
        if (isset($input[$i])) {
            $args[$i] = $input[$i];
        } 
        elseif (isset($input[$name])) {
            $args[$i] = $input[$name];
        }
        $i++;
    }
    return $args;
}


function dispatcher(array $callables, $input) {
    
    foreach ($callables as $callable) {
        
        $call = $callable['dispatch'] ?? $callable;
        $args = argument_list($call, $input);
        
 
        try {
            $match(...$args);
            
            $scores[$score] = $callable['invoke'] ?? $call;
        }
        catch (Throwable $e) {
        }
    }
    
    krsort($scores);

    foreach ($scores as $invoke) {
        return $invoke(...$input);
    } 
    
    throw $e;
}

var_dump(
    dispatcher(
        [
            ['dispatch' => ['B', 'C']],
            ['dispatch' => ['B', 'A']],
        ], 
        [2, 'hey' => 3]
    )
);