'page', 'posts_per_page' => 1, 'title' => $books_printing_pagename ); $books_printing_query = new WP_Query( $books_printing_args ); $books_printing_page_id = '1'; if (isset($books_printing_query->post->ID)) { $books_printing_page_id = $books_printing_query->post->ID; } return $books_printing_page_id; } //about theme info add_action( 'admin_menu', 'books_printing_gettingstarted' ); function books_printing_gettingstarted() { add_theme_page( esc_html__('RC Drone', 'books-printing'), esc_html__('RC Drone', 'books-printing'), 'edit_theme_options', 'books_printing_about', 'books_printing_mostrar_guide'); } // Add a Custom CSS file to WP Admin Area function books_printing_admin_theme_style() { wp_enqueue_style('books-printing-custom-admin-style', esc_url(get_template_directory_uri()) . '/includes/getstart/getstart.css'); wp_enqueue_script('books-printing-tabs', esc_url(get_template_directory_uri()) . '/includes/getstart/js/tab.js'); wp_enqueue_style( 'font-awesome-css', get_template_directory_uri().'/assets/css/fontawesome-all.css' ); // Admin notice code START wp_register_script('books-printing-notice', esc_url(get_template_directory_uri()) . '/includes/getstart/js/notice.js', array('jquery'), time(), true); wp_enqueue_script('books-printing-notice'); // Admin notice code END } add_action('admin_enqueue_scripts', 'books_printing_admin_theme_style'); // Changelog if ( ! defined( 'BOOKS_PRINTING_CHANGELOG_URL' ) ) { define( 'BOOKS_PRINTING_CHANGELOG_URL', get_template_directory() . '/readme.txt' ); } function books_printing_changelog_screen() { global $wp_filesystem; $books_printing_changelog_file = apply_filters( 'books_printing_changelog_file', BOOKS_PRINTING_CHANGELOG_URL ); if ( $books_printing_changelog_file && is_readable( $books_printing_changelog_file ) ) { WP_Filesystem(); $books_printing_changelog = $wp_filesystem->get_contents( $books_printing_changelog_file ); $books_printing_changelog_list = books_printing_parse_changelog( $books_printing_changelog ); echo '