WordPress:WPMU Functions/wpmu validate blog signup

Makes some verifications about new blog.
Located : 'wp-includes\wpmu-functions.php'

If not empty
If not illegal names like :
"www", "web", "root", "admin", "main", "invite", "administrator"
If only lowercase letters and numbers
Number of letters, at least 4 characters
If is not contain "underscore", the _ character
If is not only contain number
If already exists in DB
If reserved

To get the blog name, you would use the following:

$blog_id = 'newblog'; //the url given to the new blog E.g. newblog.domain.com
$blog_title = 'New Blog'; //the title given to the new blog

$result = wpmu_validate_blog_signup($blog_id, $blog_title);

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