Add shortcode list all blog sites

wpmudev-add-shortcode-list-all-sub-sites.php

<?php
/**
 * Plugin Name: Add shortcode list all blog sites
 * Description: Add shortcode list all blog sites ([wpmudev_list_all_blogs]) - 1155576029146873
 * Author: Thobk @ WPMUDEV
 * Author URI: https://premium.wpmudev.org
 * License: GPLv2 or later
 */
if ( ! defined( 'ABSPATH' ) || ( defined( 'WP_CLI' ) && WP_CLI ) ) {
	return;
}

add_action( 'after_setup_theme', 'wpmudev_add_shortcode_list_all_sub_sites_func' );
function wpmudev_add_shortcode_list_all_sub_sites_func(){
	if( ! is_multisite() ) return;

	add_action( 'wpmueditblogaction', 'wpmudev_add_thumbnail_option_for_sub_site', 9999 );

	function wpmudev_add_thumbnail_option_for_sub_site(){
		$option_name = 'wpmudev_featured_image_subsite';
		$option_value = get_option( $option_name );
		?>
			<tr class="form-field">
				<th scope="row"><label for="<?php echo esc_attr( $option_name ); ?>"><?php _e('Feature Image Link','wpmudev') ?></label></th>
				<td><input class="<?php echo $class; ?>" name="option[<?php echo esc_attr( $option_name ); ?>]" type="text" id="<?php echo esc_attr( $option_name ); ?>" value="<?php echo esc_attr( $option_value ); ?>" size="40" /></td>
			</tr>
		<?php
	}

	add_shortcode( 'wpmudev_list_all_blogs', 'wpmudev_list_all_blogs' );

	function wpmudev_list_all_blogs( $atts, $content='' ){
		$atts = shortcode_atts( array(
			'site__in' => '',// separated by comma (,)
			'site__not_in' => '',
			'orderby' => '',
			'order' => '',// ASC | DESC
			'show_thumbnail' => 1,
			'show_blogname' => 1,
			'show_blogdescription' => 1,
			'open_new_tab' => 1,
			'use_site_icon' => 1,
			'mtl_if_no_icon' => 1,
			'default_icon' => ''//default icon link
		), $atts );
		$query_args = array();
		if( ! empty( $atts['site__in'] ) ){
			$query_args['site__in'] = explode(',', $atts['site__in']);
		}

		if( ! empty( $atts['site__not_in'] ) ){
			$query_args['site__not_in'] = explode(',', $atts['site__not_in']);
		}

		if( $atts['orderby'] !== '' ){
			if( strpos( $atts['orderby'], ',') ){
				$atts['orderby'] = explode(',', $atts['orderby']);
			}

			$query_args['orderby'] = $atts['orderby'];
		}

		if( ! empty( $atts['order'] ) ){
			$query_args['order'] = $atts['order'];
		}

		$query_args = wp_parse_args( $query_args, array(
			'limit'    => 0,
			'public'   => true,
			'spam'     => false,
			'deleted'  => false,
			// only plubic
			'archived' => false,
			'mature'   => false,
			// 'fields'   => 'ids'
		) );

		// get sites only visible from 4.6.0
		if ( function_exists( 'get_sites' ) ) {
			$sites = get_sites( $query_args );
		} else {
			$sites = wp_get_sites( $query_args );
		}

		if( $sites ){
			$target = ! empty( $atts['open_new_tab'] ) ? '_blank' : '_self';
			$content ='<div id="wpmudev-list-blogs">';
			$moved_to_last = [];
			foreach( $sites as $site ){
				$move_to_last = 0;
				switch_to_blog( $site->blog_id );
					$new_blog ='<div class="site-info site-info-'. $site->blog_id .'">';
						$site_name = esc_html( get_bloginfo( 'name', 'display' ) );
						$before_link = sprintf('<a href="%s" title="%s" target="%s">', home_url(), $site_name, $target );
						$after_link = '</a>';
						if( $atts['show_thumbnail'] ){
							$thumbnail = get_option( 'wpmudev_featured_image_subsite' );
							if( empty( $thumbnail ) ){
								if( ! empty( $atts['use_site_icon'] ) ){
									$thumbnail = get_site_icon_url(512);
								}else{
									$custom_logo = get_theme_mod( 'custom_logo' );
									if( $custom_logo ){
										$custom_logo = wp_get_attachment_image_src( $custom_logo, 'full' );
										if( $custom_logo ){
											$thumbnail = $custom_logo[0];
										}
									}
								}
							}

							if( empty( $thumbnail ) ){
								$move_to_last = 1;
								if( ! empty( $default_icon ) ){
									$thumbnail = esc_url( $default_icon );
								}
							}

							if( $thumbnail ){
								$new_blog .= $before_link;
								$new_blog .= '<img class="site-image" alt="'. $site_name .'" src="'. esc_url( $thumbnail ) .'">';
								$new_blog .= $after_link;
							}
						}

						if( $atts['show_blogname'] ){
							$new_blog .='<h3>';
							$new_blog .= $before_link;
							$new_blog .= $site_name;
							$new_blog .= $after_link;
							$new_blog .= '</h3>';
						}

						if( $atts['show_blogdescription'] ){
							$new_blog .='<p>'. esc_html( get_bloginfo( 'description', 'display' ) ) .'</p>';
						}
					$new_blog .='</div>';

					if( $move_to_last ){
						$moved_to_last[] = $new_blog;
					}else{
						$content .= $new_blog;
					}
				restore_current_blog();
			}

			if( ! empty( $moved_to_last ) ){
				$content .= join('', $moved_to_last);
			}

			$content .= '</div>';
		}

		return $content;
	}
}