301 or 302 Redirection With PHP

Question

I\'m considering using the following code during a website launch phase to show users a down for maintenance page while showing me the rest of the site.

Is

Answer 1

save this file in the same directory as .htaccess

RewriteEngine on
RewriteBase / 

# To show 404 page 
ErrorDocument 404 /404.html

# Permanent redirect
Redirect 301 /util/old.html /util/new.php

# Temporary redirect
Redirect 302 /util/old.html /util/new.php