options for The Green Balloon website wich do not come by default with wordpress such as: selector for showing post or pages in homepage, the text area to show summary for post and pages, the map archive showing tags from posts.
Author: jorge - vitrubio.net
Date: 2020 01 10
Version: 0.3
Author URI: https://vitrubio.net/
License: GPL 3.0
License URI:https://www.gnu.org/licenses/gpl-3.0.html
*/
/* to use in the template
* include this code in post/page view
*
// // Detect plugin. For use on Front End only.
// include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
// // check for plugin using plugin name
// if ( is_plugin_active( 'hangar-wp-plugin/hangar-wp-plugin.php' ) ) {
// //plugin is activated do
// hangar_show_extra_content();
// }
*/
/*
if ever read this never forget to check
howto write a pluggin by Wordpress.org
https://codex.wordpress.org/Writing_a_Plugin
and the best practices
https://developer.wordpress.org/plugins/plugin-basics/best-practices/
*/
defined( 'ABSPATH' ) or die( 'No script kiddies please!' );
/* * * * * * * * * * * * * * * * * * * * * * * * * * */
/* begin pluggin for SHORT CODES IN PAGE OR POST */
/*
https://themefoundation.com/wordpress-meta-boxes-guide/
*/
// Adds a meta box to the post editing screen
if ( ! function_exists( 'hangar_extra_content_add_meta_box' ) ) :
function hangar_extra_content_add_meta_box() {
add_meta_box(
'hangar_extra_content', //$id
'Hangar: contingut extra', //$title
'hangar_extra_content_callback', //$callback
array('post', 'page'), // $screen
'normal', // $context // normal,side,advanced
'high' // $priority //high, core, default,low
);
}
add_action( 'add_meta_boxes', 'hangar_extra_content_add_meta_box');
endif;
// Outputs the content of the meta box
if ( ! function_exists( 'hangar_extra_content_callback' ) ) :
function hangar_extra_content_callback( $post ) {
wp_nonce_field( basename( __FILE__ ), 'hangar_extra_content_nonce' );
$hangar_extra_content_stored_meta = get_post_meta( $post->ID );
?>
entrada o página de la web.', 'hangar-wpplugin-textdomain' )?>
[shortcode] que genera el icono 
que ves en la barra de edición de texto.', 'hangar-wpplugin-textdomain' )?>
';
// to do shortcodes: https://developer.wordpress.org/reference/functions/apply_filters/
echo apply_filters( 'the_content', $meta_value);
echo '';
}
}
} // end function hangar_show_extra_content
endif;
/* * * * * * * *
/* * * * * * * * *
/* end pluggin for SHORT CODES IN PAGE OR POST */
/* * * * * * * * * * * * * * * * * * * * * * * * */