Get WP Posts as JSON

gistfile1.php

<?php

require_once(dirname(__FILE__) . '/wp-load.php');
require_once(dirname(__FILE__) . '/wp-includes/post.php');

$args = array(
  'numberposts' => 100,
  'offset'      => 0,
  'orderby'     => 'post_date',
  'order'       => 'DESC',
  'post_type'   => 'post',
  'post_status' => 'publish'
);

$posts = get_posts($args);

$items = array();

foreach($posts as $post) {
  setup_postdata($post);
  
  $item = array();
  
  $item['guid']    = $post->guid;
  $item['title']   = $post->post_title;
  $item['content'] = $post->post_excerpt;
  
  $tid = get_post_thumbnail_id($post->ID);
  $thumb = get_post($tid);
  $item['thumbnail'] = $thumb->guid;
  
  if($item['guid'] != $item['thumbnail']) {
    $items[] = $item;
  }
  
  if(count($items) == 3) break;
}

echo json_encode($items);

?>