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