A kernel in a tweet

Kernel.php

<?php
// Event Dispatcher
function e($n,$p,$c=0){static $a;@krsort($a[$n]);if($c)$a[$n][$p][]=$c;else foreach($a[$n] as$q)foreach($q as$r)$r($p);}


// Minified Kernel
// function k($r){try{e('dispatch',[$r,&$p]);e('response',$p);}catch(Exception $x){e('error',$x);}}

function k($r) {
 try {
  e('dispatch',[$r,&$p]);
  e('response',$p);
 } catch (Exception $x) {
  e('error',$x);
 }
}


// Do our controller routing here
e('dispatch', 1, function($stack) {
    // $stack[0] contains the request
    $stack[1] = 'moo';
});

e('response', 1, function($response) {
    if (!$response) {
        throw new Exception('No page found!');
    }
    header($_SERVER['SERVER_PROTOCOL'] . ' 200', true, 200);
    echo $response;
});


e('error', 1, function($exception) {
    header($_SERVER['SERVER_PROTOCOL'] . ' 500 Internal Server Error', true, 500);
    echo $exception->getMessage();
});

k('e', $_REQUEST);