<?php
class Console
{
    public function __construct($argv)
    {
        $this->config = array_merge($this->config, $this->configure($argv));
    }

    protected function configure($argv)
    {
        $config["exec"] = array_shift($argv);

        while (($key = array_shift($argv))) {
            switch ($key{0}) {
                case "-":
                    switch ($key{1}) {
                        case "-":
                            if (($dlim = strpos($key, "="))) {
                                $config[substr($key, 2, $dlim - 2)] = substr($key, $dlim + 1);
                            } else
                                $config[substr($key, 2)] = array_shift($argv);
                            break;

                        default:
                            $config["flags"][substr($key, 1)] = true;
                    }
                    break;
            }
        }

        return $config;
    }

    protected function isFlagged($name)
    {
        if (!isset($this->flags[$name])) {
            throw new \InvalidArgumentException("invalid flag requested {$name}");
        }
        return $this->flags[$name];
    }

    protected function getConfig($name)
    {
        if (!isset($this->config[$name])) {
            throw new \InvalidArgumentException("invalid configuration requested {$name}");
        }
        return $this->config[$name];
    }

    public static function main($argv = array())
    {
        return new static($argv);
    }

    protected $config = array("exec" => null, "flags" => array("default" => false));
}

class My extends Console
{
    public function __construct($argv)
    {
        parent::__construct($argv);

        try {
            $input  = $this->getConfig("input");
            $output = $this->getConfig("output");
            /* and so on */
        }
        catch (\InvalidArgumentException $error) {
            printf("Command line configuration error:\n\t%s", (string) $error);
        }
    }
}

return My::main($argv);
?>