prueba

prueba

// Add Shortcode
function custom_shortcode( $atts ) {

	// Attributes
	$atts = shortcode_atts(
		array(
			'year' => '0',
			'month' => '0',
			'day' => '0',
		),
		$atts,
		''
	);

	<iframe width="200" src="http://localhost/wordpress/wp-content/uploads/countdown/index.html?year=2018&month=1&day=1&hours=1&minutes=1&seconds=0" frameborder="0" allowfullscreen>

}
add_shortcode( 'cuenta_atras', 'custom_shortcode' );