<?php

/**
 * Configuration class
 *
 * Turns an array into $this->key variables, with optional object-wide 
 * write-locking
 */
class Config
{
    private $locked;
    private $data;

    public function __construct(array $data, $locked = TRUE)
    {
        $this->data = $data;
        $this->locked = $locked;
    }

    public function __get($key)
    {
        return $this->data[$key];
    }

    public function __set($key, $val)
    {
        if ( $this->locked )
            trigger_error('This config object is locked against modification', E_USER_WARNING);
        else
            $this->data[$key] = $val;
    }

    public function lock()
    {
        $this->locked = TRUE;
    }

    public function unlock()
    {
        $this->locked = FALSE;
    }
}

?>