将参数传递给类构造函数

How can I pass a arbitrary number of arguments to the class constructor using the Object() function defined below?

<?php

/*
./index.php
*/

function Object($object)
{
    static $instance = array();

    if (is_file('./' . $object . '.php') === true)
    {
        $class = basename($object);

        if (array_key_exists($class, $instance) === false)
        {
            if (class_exists($class, false) === false)
            {
                require('./' . $object . '.php');
            }

            /*
            How can I pass custom arguments, using the
            func_get_args() function to the class constructor?

            $instance[$class] = new $class(func_get_arg(1), func_get_arg(2), ...);
            */

            $instance[$class] = new $class();
        }

        return $instance[$class];
    }

    return false;
}

/*
How do I make this work?
*/

Object('libraries/DB', 'DATABASE', 'USERNAME', 'PASSWORD')->Query(/* Some Query */);

/*
./libraries/DB.php
*/

class DB
{
    public function __construct($database, $username, $password, $host = 'localhost', $port = 3306)
    {
        // do stuff here
    }
}

?>

$klass = new ReflectionClass($classname);
$thing = $klass->newInstanceArgs($args);

Although the need to use reflection suggests that you are overcomplicating something in your design. Why do you want to write this function in the first place?

Instead of your class taking separated parameters I'd have it take an array.

class DB
{
    public function __construct(array $params)
    {
        // do stuff here
    }
}

That way you can pass the direct result of the func_get_args into your constructor. The only problem now is being able to figure out the array key / values.

If anyone else has any ideas I'd also be delighted to know :)

I haven't tried this, but call_user_func_array sounds like you want.

$thing = call_user_func_array(array($classname, '__construct'), $args);

Have a look in the PHP Documentation.

An alternative for the reflection method, would be evaluate your code.

eval('$instance = new className('.implode(', ', $args).');');