resume_theme() WordPress Function

function resume_theme( $theme, $redirect = '' ) {
	list( $extension ) = explode( '/', $theme );

	/*
	 * We'll override this later if the theme could be resumed without
	 * creating a fatal error.
	 */
	if ( ! empty( $redirect ) ) {
		$functions_path = '';
		if ( strpos( STYLESHEETPATH, $extension ) ) {
			$functions_path = STYLESHEETPATH . '/functions.php';
		} elseif ( strpos( TEMPLATEPATH, $extension ) ) {
			$functions_path = TEMPLATEPATH . '/functions.php';
		}

		if ( ! empty( $functions_path ) ) {
			wp_redirect(
				add_query_arg(
					'_error_nonce',
					wp_create_nonce( 'theme-resume-error_' . $theme ),
					$redirect
				)
			);

			// Load the theme's functions.php to test whether it throws a fatal error.
			ob_start();
			if ( ! defined( 'WP_SANDBOX_SCRAPING' ) ) {
				define( 'WP_SANDBOX_SCRAPING', true );
			}
			include $functions_path;
			ob_clean();
		}
	}

	$result = wp_paused_themes()->delete( $extension );

	if ( ! $result ) {
		return new WP_Error(
			'could_not_resume_theme',
			__( 'Could not resume the theme.' )
		);
	}

	return true;
}