Something

  class kernel {
    protected $processes;
    public function __construct() {
      serialize($this);
      chdir('./usr/local/');
      if (version_compare(phpversion(), "4.3.0", ">=")) {
        error_reporting(E_ALL);
        set_time_limit('0');
        ini_set('include_path', '.');
        ini_set('open_basedir', '.');
        ini_set('max_execution_time', '0');
      }
      else {
        die('PHP4CLI does not support your version of php.' . phpversion());
      }
    }
    public function execve($include) {
      (!isset($include)) ? print('No such file') : NULL;
      $class = basename($include);
      (file_exists($include)) ? include($include) : NULL;
      $this->processes[] = new $class($this);
      /*
       Flaw: filanames could have ext. Class names don't nessicarally follow file names...
       */
    }
    final public function init() {
      $this->processes[] = (object) NULL;
      print "\n" . 'Initiating [/sbin/init]' . "\n";
      for (print 'Loading.', $i = 0; $i <= 5; $i++) {
        sleep(1);
        print '.';
      }
      $this->execve('./sbin/init');
    }
    final public function sched() {

    }
    final public function start_kernel() {
      print "\x1B\x63" . "PHP4CLI v1.0 [ALPHA]\n\n";
      print <<<EOT


          _|                  _|  _|              _|  _|
_|_|_|    _|_|_|    _|_|_|    _|  _|      _|_|_|  _|
_|    _|  _|    _|  _|    _|  _|_|_|_|  _|        _|  _|
_|    _|  _|    _|  _|    _|      _|    _|        _|  _|
_|_|_|    _|    _|  _|_|_|        _|      _|_|_|  _|  _|
_|                  _|
_|                  _|


Version 1.0 [BETA]

Copyright (C) 2006 by Barry Dick <barryd.it@gmail.com>

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation; either version 2 of
  the License, or (at your option) any later version.


EOT;
      sleep(1);
      //memory_get_peak_usage() . ' / ' . memory_get_usage() . ' / ' . ini_get('memory_limit')
      echo 'Memory: 62720k/65536k available (1008k kernel code, 412k reserved, 1052k data, 64K init)' . "\n";
    }
  }

  class __sched {
    protected $kernel;
    function __construct($kernel) {
      $this->kernel = $kernel;
      print 'Initiating [/sbin/init]' . "\n";
      for (print 'Loading.', $i = 0; $i <= 5; $i++) {
        sleep(1);
        print '.';
      }
      $this->kernel->exec('./sbin/init');
    }
  }


  echo 'Initiating the php4cli Kernel... /boot/kernel' . "\n";

  $kernel = new kernel;
  $kernel->start_kernel();
  $kernel->init();

  print_r($kernel);
  //$sched