Building custom shortcodes

The process of building custom shortcodes is not as complex as many people think. The minimal implementation of a shortcode requires only few lines of code as shown in the diagram in the last section. A shortcode consists of four main parts:

• Opening and closing tags: Opening and closing tags are similar to HTML, WordPress shortcodes have opening and closing tags using square brackets. These tags are used by content creators to add the functionality into posts or pages. On the other hand, developers need to use this tag to register a shortcode as a unique element. Some of the shortcodes don’t have a closing tag and use a self-enclosing opening tag. 
• Attributes: Attributes is a collection of data and settings required to process the functionality within the shortcode function and return the output. The list of attributes starts after the shortcode name in the opening tag. Each attribute has a key and values, as shown in the structure of a shortcode image. The attributes...