Recent post global shortcode

gistfile1.php

add_shortcode( 'global_recent_posts', 'global_recent_posts_sc' );
function global_recent_posts_sc( $atts ) {
	$atts = wp_parse_args( $atts, array(
		'order'                              => 'ASC',
		'orderby'                            => 'post_title',
		'is_meta'                            => 0,
		'post_type'                          => 'post',
		'post_status'                        => 'publish',
		'recentglobalpostsdisplay'           => 'title_content',
		'recentglobalpostsnumber'            => '5',
		'recentglobalpoststitlecharacters'   => '30',
		'recentglobalpostscontentcharacters' => '100',
		'recentglobalpostsavatars'           => 'show',
		'recentglobalpostsavatarsize'        => '16',
		'exclude_blogs'                      => '',
	) );
	$substr = function_exists( 'mb_substr' ) ? 'mb_substr' : 'substr';
	extract( $atts );
	$args = array(
		'post_type'   => $post_type,
		'post_status' => $post_status
	);
	if ( $is_meta ) {
		$args['meta_key'] = $orderby;
		$args['orderby']  = 'meta_value';
	} else {
		$args['orderby'] = $orderby;
	}
	$args['order'] = $order;

	$query = network_query_posts( $args );
	ob_start();
	if ( network_have_posts() ) :
		echo '<ul>';
		while ( network_have_posts() ) :
			network_the_post();
			echo '<li>';
			$post          = network_get_post();
			$the_permalink = network_get_permalink();
			$the_title     = network_get_the_title();
			$the_content   = network_get_the_content();

			if ( $recentglobalpostsavatars == 'show' ) :
				echo '<a href="', $the_permalink, '">', get_avatar( network_get_the_author_id(), $recentglobalpostsavatarsize, '' ), '</a> ';
			endif;

			$blog       = get_blog_details( $post->BLOG_ID );
			$blog_title = $blog ? $blog->blogname : '';
			$title      = $substr( $the_title, 0, $recentglobalpoststitlecharacters );
			$content    = $substr( strip_tags( $the_content ), 0, $recentglobalpostscontentcharacters );
			switch ( $recentglobalpostsdisplay ) {
				case 'blog_content':
					echo '<a href="', $the_permalink, '">', '[', $blog_title, ']</a>';
					echo '<br>';
					echo $content, $recentglobalpostscontentcharacters < strlen( $the_content ) ? '&hellip;' : '';
					echo '<br><a href="', $the_permalink, '">', __( 'Read More', 'rgpwidget' ), ' &raquo;</a>';
					break;
				case 'content':
					echo $content, $recentglobalpostscontentcharacters < strlen( $the_content ) ? '&hellip;' : '';
					echo '<br><a href="', $the_permalink, '">', __( 'Read More', 'rgpwidget' ), ' &raquo;</a>';
					break;
				case 'title':
					echo '<a href="', $the_permalink, '">', $title, '</a>';
					break;
				case 'title_blog':
					echo '<a href="', $the_permalink, '">', $title, ' [', $blog_title, ']</a>';
					break;
				case 'title_blog_content':
					echo '<a href="', $the_permalink, '">', $title, ' [', $blog_title, ']</a>';
					echo '<br>';
					echo $content;
					break;
				case 'title_content':
				default:
					echo '<a href="', $the_permalink, '">', $title, '</a>';
					echo '<br>';
					echo $content;
					break;
			}
			echo '</li>';
		endwhile;
		echo '</ul>';
	endif;
	return ob_get_clean();
}