51 lines
1.5 KiB
PHP
51 lines
1.5 KiB
PHP
<?php
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/*
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* This file is part of SwiftMailer.
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* (c) 2018 Christian Schmidt
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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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/**
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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 @). To send to such addresses, use
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* Swift_AddressEncoder_Utf8AddressEncoder together with
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* Swift_Transport_Esmtp_SmtpUtf8Handler. Your outbound SMTP server must support
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* the SMTPUTF8 extension.
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*
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* @author Christian Schmidt
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*/
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class Swift_AddressEncoder_IdnAddressEncoder implements Swift_AddressEncoder
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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 Swift_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 Swift_AddressEncoderException('Non-ASCII characters not supported in local-part', $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, 0, 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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