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insert_blog

Store basic site info in the blogs table.

install_blog

Install an empty blog.

is_user_option_local

Check whether a usermeta key has to do with the current blog.

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wp_get_sites

Return an array of sites for a network or networks.

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get_user_id_from_string

Get a numeric user ID from either an email address or a login.

wpmu_admin_do_redirect

Redirect a user based on $_GET or $_POST arguments.

get_most_active_blogs

Deprecated functionality to retrieve a list of the most active sites.

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get_blog_list

Deprecated functionality to retrieve a list of all sites.

is_main_blog

Deprecated functionality to determin if the current site is the main site.

validate_email

Deprecated functionality to validate an email address.