Closed. This question needs debugging details. It is not currently accepting answers. Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question. Closed yesterday. Improve this question I'm trying to work on a simple Ajax call and I'm unable to figure out what's gone wrong. The ajax call is successful but nothing is returning. When I console.log(response), it displays the JSON in my console though. I'm using fullcalendar library and Ajax call not returning a response to the events object Following is my action function written in functions.php file function get_order_events() { $args = array( 'status' => array('processing', 'completed', 'on-hold'), 'orderby' => 'date', 'limit' => -1, 'type' => 'shop_order', ); $customer_orders = wc_get_orders($args); $events = array(); foreach ($customer_orders as $order) { foreach ($order->get_items() as $item_id => $item_values) { $product_id =$item_values['product_id']; // Get start and end dates from post meta $start_date = wc_get_order_item_meta($item_id, 'Check-in', true); $end_date = wc_get_order_item_meta($item_id, 'Checkout', true); // Add event to the array $events[] = array( 'title' => get_the_title($product_id).' : Booked', 'start' => $start_date, 'end' => $end_date, ); } } // echo json_encode($events); wp_send_json_success($events); wp_die(); // return json_encode($events); } add_action('wp_ajax_get_order_events', 'get_order_events'); add_action('wp_ajax_nopriv_get_order_events', 'get_order_events'); Following is my js code var link = admin_object.ajax_url; $("#calendar").fullCalendar({ initialView: 'dayGridMonth', height: 650, events: function (_info, successCallback, failureCallback) { jQuery.ajax({ url: link, type: 'POST', // Use POST method dataType: 'json', data: { action: 'get_order_events' }, success: function (response) { console.log(response.data); successCallback(response.data); // $('#output').html(response.data); }, error: function (error) { console.log("Error"); failureCallback(error); } }); } });