If the shortcode produces a lot of HTML then ob_start can be used to capture output and convert it to a string as follows:
Home ยป Simple shortcode function
About Gabor Flamich
I'm a web developer and designer based in Budapest, Hungary. In recent years, I've documented hundreds of solutions I came across during development. This site is an archive for useful code snippets on WordPress, Genesis Framework and WooCommerce. If You have any questions related to WordPress development, get in touch!