134 lines
3.7 KiB
PHP
134 lines
3.7 KiB
PHP
<?php
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/**
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* This file is part of the Froxlor project.
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* Copyright (c) 2010 the Froxlor Team (see authors).
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you can also view it online at
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* https://files.froxlor.org/misc/COPYING.txt
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*
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* @copyright the authors
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* @author Froxlor team <team@froxlor.org>
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* @license https://files.froxlor.org/misc/COPYING.txt GPLv2
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*/
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namespace Froxlor\Idna;
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use Algo26\IdnaConvert\IdnaConvert;
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use InvalidArgumentException;
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/**
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* Class for wrapping a specific idna conversion class and offering a standard interface
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*
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* @author Michael Duergner <michael@duergner.com> (2003-2009)
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*/
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class IdnaWrapper
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{
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/**
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* idna converter we use
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*
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* @var object
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*/
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private $idna_converter;
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/**
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* Class constructor.
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* Creates a new idna converter
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*/
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public function __construct()
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{
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// Instantiate it
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$this->idna_converter = new IdnaConvert();
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}
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/**
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* Encode a domain name, an email address or a list of one of both.
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*
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* @param string $to_encode May be either a single domain name, e single email address or a list of one
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* separated either by ',', ';' or ' '.
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*
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* @return string Returns either a single domain name, a single email address or a list of one of
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* both separated by the same string as the input.
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*/
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public function encode(string $to_encode): string
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{
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$to_encode = $this->isUtf8($to_encode) ? $to_encode : utf8_encode($to_encode);
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try {
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return $this->idna_converter->encode($to_encode);
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} catch (InvalidArgumentException $iae) {
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if ($iae->getCode() == 100) {
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return $to_encode;
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}
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throw $iae;
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}
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}
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/**
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* check whether a string is utf-8 encoded or not
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*
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* @param string $string
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*
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* @return boolean
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*/
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private function isUtf8(string $string)
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{
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if (function_exists("mb_detect_encoding")) {
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if (mb_detect_encoding($string, 'UTF-8, ISO-8859-1') === 'UTF-8') {
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return true;
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}
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return false;
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}
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$strlen = strlen($string);
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for ($i = 0; $i < $strlen; $i++) {
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$ord = ord($string[$i]);
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if ($ord < 0x80) {
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continue; // 0bbbbbbb
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} elseif (($ord & 0xE0) === 0xC0 && $ord > 0xC1) {
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$n = 1; // 110bbbbb (exkl C0-C1)
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} elseif (($ord & 0xF0) === 0xE0) {
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$n = 2; // 1110bbbb
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} elseif (($ord & 0xF8) === 0xF0 && $ord < 0xF5) {
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$n = 3; // 11110bbb (exkl F5-FF)
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} else {
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// ungültiges UTF-8-Zeichen
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return false;
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}
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// $n Folgebytes? // 10bbbbbb
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for ($c = 0; $c < $n; $c++) {
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if (++$i === $strlen || (ord($string[$i]) & 0xC0) !== 0x80) {
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// ungültiges UTF-8-Zeichen
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return false;
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}
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}
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}
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// kein ungültiges UTF-8-Zeichen gefunden
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return true;
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}
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/**
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* Decode a domain name, an email address or a list of one of both.
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*
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* @param string $to_decode May be either a single domain name, e single email address or a list of one
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* separated either by ',', ';' or ' '.
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*
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* @return string Returns either a single domain name, a single email address or a list of one of
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* both separated by the same string as the input.
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*/
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public function decode(string $to_decode): string
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{
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return $this->idna_converter->decode($to_decode);
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}
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}
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