<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Mime\Encoder;
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use Symfony\Component\Mime\Exception\AddressEncoderException;
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/**
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* An IDN email address encoder.
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*
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* Encodes the domain part of an address using IDN. This is compatible will all
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* SMTP servers.
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*
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* This encoder does not support email addresses with non-ASCII characters in
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* local-part (the substring before @).
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*
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* @author Christian Schmidt
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*/
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final class IdnAddressEncoder implements AddressEncoderInterface
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{
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/**
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* Encodes the domain part of an address using IDN.
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*
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* @throws AddressEncoderException If local-part contains non-ASCII characters
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*/
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public function encodeString(string $address): string
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{
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$i = strrpos($address, '@');
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if (false !== $i) {
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$local = substr($address, 0, $i);
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$domain = substr($address, $i + 1);
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if (preg_match('/[^\x00-\x7F]/', $local)) {
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throw new AddressEncoderException(sprintf('Non-ASCII characters not supported in local-part os "%s".', $address));
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}
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if (preg_match('/[^\x00-\x7F]/', $domain)) {
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$address = sprintf('%s@%s', $local, idn_to_ascii($domain, \IDNA_DEFAULT | \IDNA_USE_STD3_RULES | \IDNA_CHECK_BIDI | \IDNA_CHECK_CONTEXTJ | \IDNA_NONTRANSITIONAL_TO_ASCII, \INTL_IDNA_VARIANT_UTS46));
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}
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}
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return $address;
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}
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}
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