related articles using shortcodes

by

The best way to add the shortcode is to create a shortcode in your child theme functiuons.php file. 

function footag_func( $atts ) {            //Example
    return "foo = {$atts['foo']}";
}
add_shortcode( 'footag', 'footag_func' );

You can refer to this document for WordPress shortcodes detail

https://codex.wordpress.org/Function_Reference/add_shortcode