Love and Theft

Despite my recent interest in F#, I just had to post this nice little code nugget I came up with for the view/action layer of my framework that allows you to call a method (or function) with named arguments in PHP:

<?php
class news_ListView {

    function render ($id, $page = 0, $items_pp = 10,
                     $order_by = 'date', $method = 'desc') {
        echo "
            id: $id,
            page: $page,
            items_pp: $items_pp,
            order_by: $order_by,
            method: $method
        ";
    }

}

function call_with_namedargs ($callback, $args = array()) {
    $params = get_named_args($callback);

    foreach ($args as $arg => $value) {
        $params[$arg] = $value;
    }

    return call_user_func_array($callback, array_values($params));
}

function get_named_args ($callback) {
    if (is_array($callback))
        $function = new ReflectionMethod($callback[0], $callback[1]);
    else
        $function = new ReflectionFunction($callback);

    $params = array();

    foreach ($function->getParameters() as $param) {

        if ($param->isOptional())
            $params[$param->name] = $param->getDefaultValue();
        else
            $params[$param->name] = null;

    }

    return $params;
}

$view = new news_ListView;
call_with_namedargs(array($view, 'render'), array('order_by' => 'name'));