dispatch on function signatures

dispatch.php

<?php
class B {
    
    public static function A(int $a, int $b = NULL) {
        
    }
    
    public static function C(int $a) {
        
        return 2;
    }
}


function dispatcher(array $callables, $input) {
    
    $scores = [];
    foreach ($callables as $callable) {
        
        $match = $callable['dispatch'];
        try {
            $match(...$input);
            $score = count((new ReflectionMethod(...$match))->getParameters());
            $scores[$score] = $callable['invoke'] ?? $match;
        }
        catch (Throwable $e) {
        }
    }
    
    krsort($scores);

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

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

(method dispatcher)