Wordpress loop that assign an associative array to an array then echo json

loopy.php

define('WP_USE_THEMES', false);
require($_SERVER['DOCUMENT_ROOT'] . '/wp-blog-header.php');
header('HTTP/1.1 200 OK');
header('Content-type: application/json;');

$posts = array();
if (have_post()) :
    while (have_posts()) :
        $posts = the_post();
        $posts['id'] = the_ID();
        $posts['title'] = the_title();
    $results[] = $posts;
    endwhile;
    echo json_encode($results);
endif;