Find out whether a user is a member of a given blog.
<?php is_user_member_of_blog( $user_id, $blog_id ); ?>
Check if the current user is a member of blog 5:
<?php
$user_id = get_current_user_id();
$blog_id = 5;
if ( is_user_member_of_blog( $user_id, $blog_id ) ) {
/*
* The user is a member of the blog with ID 5.
* We could do stuff here, like show them a link, etc.
*/
}
?>
Since: MU
is_user_member_of_blog() is located in wp-includes/user.php
Blog User Functions: add_user_to_blog(), add_new_user_to_blog(), remove_user_from_blog(), is_user_member_of_blog()