According to the WordPress.com definition, a shortcode is a WordPress-specific code that lets you do nifty things with very little effort. Shortcodes can embed files or create objects that would normally require lots of complicated, ugly code in just one line. In other words, thanks to WordPress shortcodes there’s no need for users to manually add HTML code into post content and, in addition, it’s possible to dynamically change the output under specific conditions (i.e. the logged-in user, the current date, the user location, etc.). If you’ve ever used the shortcode, you already know how WordPress shortcodes work:
In this example, gallery is the shortcode tag, while ids, order, orderby and colums are the shortcode attributes. These attributes determine the returned HTML code.
Shortcode Typologies and Structure
WordPress provides two shortcode typologies:
Self-closing shortcodes look like the shortcode, and do not require a closing tag.
Enclosing shortcodes require a closing tag, and allow the manipulation of the enclosed content.
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Source: https://managewp.org/articles/14710/an-introduction-to-wordpress-shortcodes-for-developers
source https://williechiu40.wordpress.com/2017/03/28/an-introduction-to-wordpress-shortcodes-for-developers/
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