Enable TablePress shortcodes in WordPress' administrative back-end

enable-back-end-tablepress-shortcodes.php

<?php

/**
 * Support TablePress shortcodes in the administrative back-end
 *
 * Hook to `admin_init`.
 *
 * @author Matthew Eppelsheimer
 */
function rli_support_tablepress_shortcodes_in_admin() {
	// Bail if TablePress isn't active
	if ( ! class_exists( 'TablePress' ) ) {
		return;
	}

	// Load the frontend controller
	TablePress::load_controller( 'frontend' );

	// class methods aren't static so we need an instance to call them
	$controller = new TablePress_Frontend_Controller();

	// Register the shortcode
	$controller->init_shortcodes();
	// Load table CSS
	add_action( 'admin_enqueue_scripts', array( $controller, 'enqueue_css' ) );
}
add_action( 'admin_init', 'rli_support_tablepress_shortcodes_in_admin', 10 );