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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
1693 | } |
1694 |
|
1695 | /** |
1696 | * Correct 404 redirects when NOBLOGREDIRECT is defined. |
1697 | * |
1698 | * @since MU |
1699 | */ |
1700 | function maybe_redirect_404() { |
1701 | global $current_site; |
1702 | if ( is_main_site() && is_404() && defined( 'NOBLOGREDIRECT' ) && ( $destination = apply_filters( 'blog_redirect_404', NOBLOGREDIRECT ) ) ) { |
1703 | if ( $destination == '%siteurl%' ) |
1704 | $destination = network_home_url(); |
1705 | wp_redirect( $destination ); |
1706 | exit(); |
1707 | } |
1708 | } |
1709 |
|
1710 | /** |
1711 | * Add a new user to a blog by visiting /newbloguser/username/. |