If you don’t have an existing shortcode to get the value you need, you can write a custom shortcode. If you’re familiar with PHP, it’s really easy.
All you do is define a shortcode tag and a function that handles processing that tag.
Here’s a basic template to create a [my_special_shortcode] shortcode:
add_shortcode( 'my_special_shortcode', 'my_special_shortcode_function' );
function my_special_shortcode_function( $atts , $content ){
return "hey I'm a custom shortcode!";
}
Which just means that when the following shortcode is processed:
[my_special_shortcode]
it’ll be replaced by the text
hey I'm a custom shortcode!
For full details on how to write a custom shortcode, use custom attributes and content, etc, please review the following resources: