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Function Reference/maybe redirect 404

Applies only for WordPress Multisite installation

Correct 404 redirects when NOBLOGREDIRECT is defined

<?php maybe_redirect_404() ?>

This function does not accept any parameters

This function does not return any value. If all conditions are met, it does not return at all, rather the redirect is executed.

If registration is disabled, please set NOBLOGREDIRECT in wp-config.php to a URL you will redirect visitors to if they visit a non-existent site:

define( 'NOBLOGREDIRECT', '%siteurl%' );

or

define( 'NOBLOGREDIRECT', 'http://www.my-ms.com' );

Since: MU

maybe_redirect_404() is located in wp-includes/ms-functions.php