Datatables Wordpress Functions

add_action('wp_ajax_get_registrations_for_export', 'get_registrations_for_export');
add_action('wp_ajax_nopriv_get_registrations_for_export', 'get_registrations_for_export');

function get_registrations_for_export() {
	// echo '<pre>';print_r($_GET);exit;
	$post_statuses = array('unpaid', 'publish', 'cancelled');

	$args = array(
		'post_type' => 'fka_registrations', 
		'post_status' => $post_statuses,
		'posts_per_page' => 25,
		'no_found_rows' => true,
		'fields' => 'ids'
		);
		
	$argsCount = array(
		'post_type' => 'fka_registrations', 
		'post_status' => $post_statuses,
		'posts_per_page' => -1,
		'no_found_rows' => true,
		'fields' => 'ids'
		);

	$registrations_to_export = get_posts( $args);
	$registrations_count = get_posts( $argsCount);
	$total_registrations = count($registrations_count);
	//echo '<pre>';print_r($total_registrations);exit;
	$registrations = array();

	foreach ($registrations_to_export as $key => $registration_id) {

		
	 	$class_activity = get_field('activity', $registration_id);
		$activity_name = $class_activity->post_title;
		$activity_id = $class_activity->ID;


		$school_obj = get_field('school', $registration_id);
		if ($school_obj) {
		    $school_name = $school_obj->post_title;
		    $school_id = $school_obj->ID;
		}


		$session_obj = get_field('session', $registration_id);
		$session_name = $session_obj->name;
		$session_id = $session_obj->term_id;


		$product_info = get_page_by_title($school_name .' '. $activity_name, OBJECT, 'product');
		if ($product_info) {
		    $fka_product_id = $product_info->ID;
		}

		$location = get_field('location_to_meet_coach', $fka_product_id);
		$class_day = get_field('class_day', $fka_product_id);


		$class_start_time = get_field('class_start_time', $fka_product_id);
		$class_end_time = get_field('class_end_time', $fka_product_id);
		$class_sessions = get_field('sessions', $fka_product_id);
		$name = get_the_title($registration_id);

		$array_key = fka_search_array($session_id, $class_sessions, $name);
		// echo '<pre>';print_r($array_key);exit;
		if ($array_key || $array_key == '0') {
		    $session_start_date = $class_sessions[$array_key]['session_start_date'];
		    $session_start_date = new DateTime($session_start_date);
		    $session_end_date = $class_sessions[$array_key]['session_end_date'];
		    $session_end_date = new DateTime($session_end_date);
		}
		$reg_post_status = get_post_status( $post);

		if ($reg_post_status == 'publish') {
		    $reg_post_status = 'Paid';
		}
		$registrations[] = array(
			$name,
			$activity_name,
			$school_name,
			$class_day,
			$class_start_time .' - '. $class_end_time,
			$session_name,
			$location,
			'Test',
			'English',
			'hmmm',
			'English',
			'Dave',
			'Demuth',
			'Class',
			'Test',
			'English',
			'Dave',
			'Demuth',
			'Class',
			'Test',
			'English'
		);
	}

	$output['draw'] = 1;
	$output['recordsTotal'] = $total_registrations;
	$output['recordsFiltered'] = $total_registrations;
	$output['data'] = $registrations;

	wp_send_json($output);
}