c41n_shortcode_enclosing

// Add Shortcode
function c41n_shortcode_enclosing( $atts , $content = null ) {

	// Attributes
	$atts = shortcode_atts(
		array(
			'cont' => 'Debes incluir contenido aquí con arg "cont"',
		),
		$atts,
		'c41n_shortcode_enclosing'
	);

	//Podemos usar o no $atts['cont']
	echo "$content";

}
add_shortcode( 'c41n_shortcode_enclosing', 'c41n_shortcode_enclosing' );