1 *******************************************************************************
3 * IDNA Convert (idna_convert.class.php) *
5 * http://idnaconv.phlymail.de mailto:phlymail@phlylabs.de *
6 *******************************************************************************
7 * (c) 2004-2007 phlyLabs, Berlin *
8 * This file is encoded in UTF-8 *
9 *******************************************************************************
14 The class idna_convert allows to convert internationalized domain names
15 (see RFC 3490, 3491, 3492 and 3454 for detials) as they can be used with various
16 registries worldwide to be translated between their original (localized) form
17 and their encoded form as it will be used in the DNS (Domain Name System).
19 The class provides two public methods, encode() and decode(), which do exactly
20 what you would expect them to do. You are allowed to use complete domain names,
21 simple strings and complete email addresses as well. That means, that you might
22 use any of the following notations:
26 - xn--brse-5qa.xn--knrz-1ra.info
28 Errors, incorrectly encoded or invalid strings will lead to either a FALSE
29 response (when in strict mode) or to only partially converted strings.
30 You can query the occured error by calling the method get_last_error().
32 Unicode strings are expected to be either UTF-8 strings, UCS-4 strings or UCS-4
33 arrays. The default format is UTF-8. For setting different encodings, you can
34 call the method setParams() - please see the inline documentation for details.
35 ACE strings (the Punycode form) are always 7bit ASCII strings.
37 ATTENTION: We no longer supply the PHP5 version of the class. It is not
38 necessary for achieving a successfull conversion, since the supplied PHP code is
39 compatible with both PHP4 and PHP5. We expect to see no compatibility issues
40 with the upcoming PHP6, too.
46 idna_convert.class.php - The actual class
47 idna_convert.create.npdata.php - Useful for (re)creating the NPData file
48 npdata.ser - Serialized data for NamePrep
49 example.php - An example web page for converting
50 ReadMe.txt - This file
51 LICENCE - The LGPL licence file
53 The class is contained in idna_convert.class.php.
54 MAKE SURE to copy the npdata.ser file into the same folder as the class file
61 1. Say we wish to encode the domain name nörgler.com:
64 include_once('idna_convert.class.php');
66 $IDN = new idna_convert();
67 // The input string, if input is not UTF-8 or UCS-4, it must be converted before
68 $input = utf8_encode('nörgler.com');
69 // Encode it to its punycode presentation
70 $output = $IDN->encode($input);
71 // Output, what we got now
72 echo $output; // This will read: xn--nrgler-wxa.com
75 2. We received an email from a punycoded domain and are willing to learn, how
76 the domain name reads originally
79 include_once('idna_convert.class.php');
80 // Instantiate it (depending on the version you are using) with
81 $IDN = new idna_convert();
83 $input = 'andre@xn--brse-5qa.xn--knrz-1ra.info';
84 // Encode it to its punycode presentation
85 $output = $IDN->decode($input);
86 // Output, what we got now, if output should be in a format different to UTF-8
87 // or UCS-4, you will have to convert it before outputting it
88 echo utf8_decode($output); // This will read: andre@börse.knörz.info
91 3. The input is read from a UCS-4 coded file and encoded line by line. By
92 appending the optional second parameter we tell enode() about the input
96 include_once('idna_convert.class.php');
98 $IDN = new dinca_convert();
99 // Iterate through the input file line by line
100 foreach (file('ucs4-domains.txt') as $line) {
101 echo $IDN->encode(trim($line), 'ucs4_string');
109 Should you need to recreate the npdata.ser file, which holds all necessary translation
110 tables in a serialized format, you can run the file idna_convert.create.npdata.php, which
111 creates the file for you and stores it in the same folder, where it is placed.
112 Should you need to do changes to the tables you can do so, but beware of the consequences.
118 In case of errors, bugs, questions, wishes, please don't hesitate to contact us
119 under the email address above.
123 mailto:phlymail@phlylabs.de