Switcher.php

<?php

class Switcher {

    public static $calls = [];

    public static function register($case, Closure $callback){
        self::$calls[$case] = new Executor($callback);
    }

    public static function onCase($case){
        return isset(self::$calls[$case]) ? self::$calls[$case] : new Executor(function(){});
    }
}

class Executor {

    public function __construct(Closure $callback){
        $this->callback = $callback;
    }

    public function call(...$args){
        $callback = $this->getCallBack();
        return call_user_func_array($callback, $args);
    }


    public function getCallBack(){
        return $this->callback;
    }
}


Switcher::register(1, function($a,$b){
    echo "$a:$b wwwww\n";
});
Switcher::register(2, function(){
    return 1 + 1;
});

Switcher::onCase(1)->call(2,4);
echo Switcher::onCase(2)->call(2,3);