shortcode

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

	// Attributes
	$atts = shortcode_atts(
		array(
			'foo' => '123',
			'bar' => '123',
		),
		$atts
	);

	return $text;

}
add_shortcode( 'challenge', 'worx_challange_shortcode_init' );