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My Permalink custom url is /%post_id%/%postname%/

and my website is in Persian language, for some posts the Permalink is change in URL from

http://www.ahangbaz.com/1300/%d8%a7%d8%a8%db%8c-%d8%b7%d9%be%d8%b4-%da%86%d8%b4%d9%85%d9%87/ into --> http://www.ahangbaz.com/1300/?-???-????/

but this doesn't happen for all post, for e.g following post works fine: ahangbaz.com/1106/%D9%82%DB%8C%D8%B5%D8%B1-%D8%A8%D8%B9%D8%AF-%DA%86%D9%86%D8%AF-%D8%B3%D8%A7%D9%84/

I checked in wp_posts table of wordpress and Post_name seems similar for both posts.

If I change the post_name to English it works fine but when post_name is in Persian,problem occures. web server is IIS 7.5 on windows 2008 R2.

Further tests:

  • I changed the thema and disabled all plugin, it still happens. I checked DB colation and its UTF8.

  • To reproduce the issue use the post_title = ابی - طپش - چشمه and post_name will be %d8%a7%d8%a8%db%8c-%d8%b7%d9%be%d8%b4-%da%86%d8%b4%d9%85%d9%87

  • The same problem happens with categories when the slug is in Persian ahangbaz.com/category/%d8%a7%d8%a8%db%8c doesn't work but when its in English or a number it works ahangbaz.com/category/22.

share|improve this question
Hm, I get /368/ابی-ستاره-دنباله-دار-ستاره-دنباله-دار/ as URL for this in my installation (Apache server). Maybe a server issue. – toscho Apr 7 '13 at 8:18
Do you have IIS 7.5 environment to reproduce ? it works for some posts like ahangbaz.com/1106/… – Robert Apr 7 '13 at 8:24
Unfortunately, I have no IIS 7.5 at hand. Maybe someone else can make further tests. I moved your further information from the comments to the question body to make it easier to read. – toscho Apr 7 '13 at 8:31
in fiddler i can see that GET ahangbaz.com/1300/… HTTP/1.1 ----->>>> HTTP/1.1 301 Moved Permanently Content-Type: text/html; charset=UTF-8 Location: ahangbaz.com/1300/?-???-???? Server: Microsoft-IIS/7.5 – Robert Apr 7 '13 at 8:49
I don't think this is a DB problem. Looks more like URL handling in either the server or PHP. – toscho Apr 7 '13 at 10:13

I don't have comment capabilities, but the problem is very likely to be on the MS server side, specifically the URL Rewrite module. This is what handles permalinks on IIS. There is a hotfix for this problem, but you should probably apply all the hotfixes available for your system.

share|improve this answer
Well, IMO, this is much more an Answer than a Comment. But adding a summary from the external link would improve greatly the quality of the answer. – brasofilo May 13 '13 at 4:13

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