get_blog_option( $blog_id, $setting, $default=’na’ )

Summary:  Function returns the value of the specified option $setting.

Detail:  This is a surprisingly complex function that returns the value of the specified options $setting.  It first checks for the existence of a wp-cache value, and if none exists, queries the database.

The rest of the function complexity is simply to make sure that a properly-validated URL is returned if the requested option is the site URL.

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