Criar páginas no WordPress sem utilizar o painel com wp_insert_post

wp_insert_post.php

<?php
$default_configs = array(
  'post_status'    => 'publish',
  'post_type'      => 'page',
  'comment_status' => 'closed',
  'ping_status'    => 'closed',
  'post_content'   => ''
);

$panel_pages = array(
  array(
    'post_title' => 'Página 1',
    'post_name'  => 'pagina1'
  ),

  array(
    'post_title' => 'Página 2',
    'post_name'  => 'pagina2'
  ),

  array(
    'post_title' => 'Página 3',
    'post_name'  => 'pagina3'
  )
);

foreach( $panel_pages as $p_page ) {
  if( !get_page_by_path( $p_page['post_name'] ) ) {
    wp_insert_post( array_merge( $default_configs, $p_page ) );
  }
}