DROPINS.WORDPRESS

/**
 * Returns drop-ins that WordPress uses.
 *
 * Includes Multisite drop-ins only when is_multisite()
 *
 * @since 3.0.0
 * @return array Key is file name. The value is an array, with the first value the
 *	purpose of the drop-in and the second value the name of the constant that must be
 *	true for the drop-in to be used, or true if no constant is required.
 */
function _get_dropins() {
	$dropins = array(
		'advanced-cache.php' => array( __( 'Advanced caching plugin.'       ), 'WP_CACHE' ), // WP_CACHE
		'db.php'             => array( __( 'Custom database class.'         ), true ), // auto on load
		'db-error.php'       => array( __( 'Custom database error message.' ), true ), // auto on error
		'install.php'        => array( __( 'Custom install script.'         ), true ), // auto on install
		'maintenance.php'    => array( __( 'Custom maintenance message.'    ), true ), // auto on maintenance
		'object-cache.php'   => array( __( 'External object cache.'         ), true ), // auto on load
	);

	if ( is_multisite() ) {
		$dropins['sunrise.php'       ] = array( __( 'Executed before Multisite is loaded.' ), 'SUNRISE' ); // SUNRISE
		$dropins['blog-deleted.php'  ] = array( __( 'Custom site deleted message.'   ), true ); // auto on deleted blog
		$dropins['blog-inactive.php' ] = array( __( 'Custom site inactive message.'  ), true ); // auto on inactive blog
		$dropins['blog-suspended.php'] = array( __( 'Custom site suspended message.' ), true ); // auto on archived or spammed blog
	}

	return $dropins;
}