[wp-trac] [WordPress Trac] #15554: Sites with IDN domains can't be created

[WordPress Trac]

#15554: Sites with IDN domains can't be created
----------------------------+-----------------------------------------------
 Reporter:  SergeyBiryukov  |       Owner:                 
     Type:  defect (bug)    |      Status:  new            
 Priority:  normal          |   Milestone:  Awaiting Review
Component:  Multisite       |     Version:  3.0.1          
 Severity:  normal          |    Keywords:                 
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 When I try to create a new site with any valid IDN domain in Multisite, I
 get “Missing or invalid site address” error.

 I found the line in {{{ms-edit.php}}} from r13630 which causes the
 problem:
 {{{
 if ( ! preg_match( '/(--)/', $blog['domain'] ) && preg_match(
 '|^([a-zA-Z0-9-])+$|', $blog['domain'] ) )
         $domain = strtolower( $blog['domain'] );
 }}}
 What is the purpose of the first check? When I remove it and leave only
 the second one, the site is added correctly.

 Also, is it possible convert a domain name to Punycode automatically from
 UTF-8?

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Ticket URL: <http://core.trac.wordpress.org/ticket/15554>
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