default.php

<?php
class Foo {
    public function __construct() {
        var_dump(get_object_vars($this));
    }
}

class Bar {
    public function __construct(Array $args) {
        foreach ($args as $key => $value) {
            $this->$key = $value;
        }
        var_dump(get_object_vars($this));
    }
}

function init($class, $data) {
    $t = new ReflectionClass($class);
    $inst = $t->newInstanceWithoutConstructor();
    foreach ($data as $key => $value)
        $inst->$key = $value;
    $inst->bar = 'bice';
    return $inst->__construct();
}

$data = array('bar' => 'bice');

$obj1 = init('Foo', $data);
$obj2 = new Bar($data);

hardcore stuff