Como insertar publicaciones en WP

php

<?php
// Load WordPress
require_once '../wp-load.php';
require_once ABSPATH . '/wp-admin/includes/taxonomy.php';
// Set the timezone so times are calculated correctly
date_default_timezone_set('Europe/London');
// Create post
$titulo = $_POST['titulo'];
$cotenido = $_POST['contenido'];

/*$id = wp_insert_post(array(
    'post_title' => $title,
    'post_content' => $content,
    'post_date' => date('Y-m-d H:i:s'),
    'post_author' => $user_id,
    'post_type' => 'post',
    'post_status' => 'publish',
));*/


$id = wp_insert_post(array(
    'post_title' => 'TITULOX2',
    'post_content' => 'CONTENIDOX2',
    'post_date' => date('Y-m-d H:i:s'),
    'post_author' => 1,
    'post_type' => 'post',
    'post_status' => 'publish',
));
if ($id) {
    // Set category - create if it doesn't exist yet
    wp_set_post_terms($id, wp_create_category('My Category'), 'category');
    // Add meta data, if required
    add_post_meta($id, 'meta_key', $metadata);
    echo json_encode(["status" => "OK"]);
} else {
    echo "WARNING: Failed to insert post into WordPress\n";
}