Sites with IDN domains can't be created (bug #15554 continuation)

[qdinar]

registration of new site with idn domain by unknown/new users themselves is not possible.
(though creation of new site in wp-admin/network/site-new.php page is possible, by patch given in bug #15554 , i have just now tested it.)

also let i mention that site domain is written (and would be requested to enter, if would be fixed without punycode to unicode conversion) in punicode form in wp-signup.php page, that is not acceptable for wordpress.

i have attached differences i made to wp 3.0.4 to make idn domains working and also to show and accept them in human readable format in wp-signup.php page . link to the differences file i attached to/in previous bug report on/to this topic: ​http://core.trac.wordpress.org/attachment/ticket/15554/diff304-blogo.txt .

[ocean90]

See ​http://codex.wordpress.org/Reporting_Bugs#Trac_Keywords

[qdinar]

i would change "component" from "general" to I18N or Multisite.

i am now going to make same changes as in the "diff" to v. 3.3 .

[qdinar]

i [will] attach differences [i] made to v 3.3.
but this do not work at my installation, i have segfault and premature end of script headers errors.

[qdinar]

idn.default_charset=UTF-8
php option to make php5-idn working.

[qdinar]

i will attach same [my] diff in correct ("unified") format, i could not patch my old diff, so read about diff and patch usage. i hope this diff will be highlited in this site.

[kawauso]

​idn_to_utf8 (idn_to_unicode) and ​idn_to_ascii are only available in PHP 5.3 and the intl PECL library, so those would need drop-in compatibility functions I believe.

[SergeyBiryukov]

Related: #20019

[chriscct7]

Per comment:8 the current patch isn't usable

[qdinar]

Replying to kawauso:

​idn_to_utf8 (idn_to_unicode) and ​idn_to_ascii are only available in PHP 5.3 and the intl PECL library, so those would need drop-in compatibility functions I believe.

i searched for php punycode functions and found several, 4 years ago, but did not post about them here. i thought it is not hard to search and find them if anybody want to use them. but this time i post some links and info and questions.

i have found several libraries this time:

GPL : ​https://phlymail.com/en/downloads/idna-convert.html -> ​http://idnaconv.net/get-it.html -> ​https://github.com/phlylabs/idna-convert

MIT: ​http://www.zedwood.com/article/php-idn-punycode-converter -> ​https://github.com/mk-j/PHP_IDN_Punycode

bsd?: ​https://github.com/true/php-punycode

MIT: ​https://code.google.com/archive/p/punycode-library/downloads

​https://ckon.wordpress.com/2010/08/24/punycode-to-unicode-converter-php/

​http://belousovv.ru/myscript/phpIDN

how should i or other user submit this library for wordpress? are not they too big for a patch? in which directory it should be installed?

[realloc]

The original issue is still valid for user signups, although it’s now limited in scope.

Given modern PHP requirements and the widespread availability of ​IDN functions, the suggested use of a third-party library is no longer needed.

In subdomain-based networks (e.g. bücher.example.com), allowing Unicode input makes sense and can be normalized to punycode during submission. For subdirectory-based setups (e.g. example.com/bücher), support would require broader changes to core.