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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Mime\Encoder;
/**
* An IDN email address encoder.
*
* Encodes the domain part of an address using IDN. This is compatible will all
* SMTP servers.
*
* Note: It leaves the local part as is. In case there are non-ASCII characters
* in the local part then it depends on the SMTP Server if this is supported.
*
* @author Christian Schmidt
*/
final class IdnAddressEncoder implements AddressEncoderInterface
{
/**
* Encodes the domain part of an address using IDN.
*/
public function encodeString(string $address): string
{
$i = strrpos($address, '@');
if (false !== $i) {
$local = substr($address, 0, $i);
$domain = substr($address, $i + 1);
if (preg_match('/[^\x00-\x7F]/', $domain)) {
$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));
}
}
return $address;
}
}
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