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123 lines
4.7 KiB
Plaintext
123 lines
4.7 KiB
Plaintext
*******************************************************************************
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* *
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* IDNA Convert (idna_convert.class.php) *
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* *
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* http://idnaconv.phlymail.de mailto:phlymail@phlylabs.de *
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*******************************************************************************
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* (c) 2004-2007 phlyLabs, Berlin *
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* This file is encoded in UTF-8 *
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*******************************************************************************
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Introduction
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------------
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The class idna_convert allows to convert internationalized domain names
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(see RFC 3490, 3491, 3492 and 3454 for detials) as they can be used with various
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registries worldwide to be translated between their original (localized) form
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and their encoded form as it will be used in the DNS (Domain Name System).
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The class provides two public methods, encode() and decode(), which do exactly
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what you would expect them to do. You are allowed to use complete domain names,
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simple strings and complete email addresses as well. That means, that you might
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use any of the following notations:
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- www.nörgler.com
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- xn--nrgler-wxa
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- xn--brse-5qa.xn--knrz-1ra.info
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Errors, incorrectly encoded or invalid strings will lead to either a FALSE
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response (when in strict mode) or to only partially converted strings.
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You can query the occured error by calling the method get_last_error().
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Unicode strings are expected to be either UTF-8 strings, UCS-4 strings or UCS-4
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arrays. The default format is UTF-8. For setting different encodings, you can
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call the method setParams() - please see the inline documentation for details.
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ACE strings (the Punycode form) are always 7bit ASCII strings.
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ATTENTION: We no longer supply the PHP5 version of the class. It is not
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necessary for achieving a successfull conversion, since the supplied PHP code is
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compatible with both PHP4 and PHP5. We expect to see no compatibility issues
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with the upcoming PHP6, too.
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Files
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-----
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idna_convert.class.php - The actual class
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idna_convert.create.npdata.php - Useful for (re)creating the NPData file
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npdata.ser - Serialized data for NamePrep
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example.php - An example web page for converting
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ReadMe.txt - This file
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LICENCE - The LGPL licence file
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The class is contained in idna_convert.class.php.
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MAKE SURE to copy the npdata.ser file into the same folder as the class file
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itself!
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Examples
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--------
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1. Say we wish to encode the domain name nörgler.com:
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// Include the class
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include_once('idna_convert.class.php');
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// Instantiate it *
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$IDN = new idna_convert();
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// The input string, if input is not UTF-8 or UCS-4, it must be converted before
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$input = utf8_encode('nörgler.com');
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// Encode it to its punycode presentation
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$output = $IDN->encode($input);
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// Output, what we got now
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echo $output; // This will read: xn--nrgler-wxa.com
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2. We received an email from a punycoded domain and are willing to learn, how
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the domain name reads originally
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// Include the class
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include_once('idna_convert.class.php');
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// Instantiate it (depending on the version you are using) with
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$IDN = new idna_convert();
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// The input string
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$input = 'andre@xn--brse-5qa.xn--knrz-1ra.info';
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// Encode it to its punycode presentation
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$output = $IDN->decode($input);
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// Output, what we got now, if output should be in a format different to UTF-8
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// or UCS-4, you will have to convert it before outputting it
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echo utf8_decode($output); // This will read: andre@börse.knörz.info
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3. The input is read from a UCS-4 coded file and encoded line by line. By
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appending the optional second parameter we tell enode() about the input
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format to be used
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// Include the class
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include_once('idna_convert.class.php');
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// Instantiate it
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$IDN = new dinca_convert();
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// Iterate through the input file line by line
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foreach (file('ucs4-domains.txt') as $line) {
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echo $IDN->encode(trim($line), 'ucs4_string');
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echo "\n";
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}
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NPData
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------
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Should you need to recreate the npdata.ser file, which holds all necessary translation
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tables in a serialized format, you can run the file idna_convert.create.npdata.php, which
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creates the file for you and stores it in the same folder, where it is placed.
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Should you need to do changes to the tables you can do so, but beware of the consequences.
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Contact us
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----------
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In case of errors, bugs, questions, wishes, please don't hesitate to contact us
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under the email address above.
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The team of phlyLabs
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http://phlylabs.de
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mailto:phlymail@phlylabs.de |