73 lines
1.9 KiB
PHP
73 lines
1.9 KiB
PHP
<?php
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namespace Egulias\EmailValidator\Validation;
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use Egulias\EmailValidator\EmailLexer;
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use Egulias\EmailValidator\Exception\InvalidEmail;
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use Egulias\EmailValidator\Warning\NoDNSMXRecord;
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use Egulias\EmailValidator\Exception\NoDNSRecord;
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class DNSCheckValidation implements EmailValidation
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{
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/**
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* @var array
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*/
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private $warnings = [];
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/**
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* @var InvalidEmail
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*/
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private $error;
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public function __construct()
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{
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if (!extension_loaded('intl')) {
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throw new \LogicException(sprintf('The %s class requires the Intl extension.', __CLASS__));
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}
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}
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public function isValid($email, EmailLexer $emailLexer)
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{
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// use the input to check DNS if we cannot extract something similar to a domain
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$host = $email;
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// Arguable pattern to extract the domain. Not aiming to validate the domain nor the email
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if (false !== $lastAtPos = strrpos($email, '@')) {
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$host = substr($email, $lastAtPos + 1);
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}
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return $this->checkDNS($host);
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}
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public function getError()
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{
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return $this->error;
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}
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public function getWarnings()
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{
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return $this->warnings;
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}
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protected function checkDNS($host)
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{
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$variant = INTL_IDNA_VARIANT_2003;
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if ( defined('INTL_IDNA_VARIANT_UTS46') ) {
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$variant = INTL_IDNA_VARIANT_UTS46;
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}
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$host = rtrim(idn_to_ascii($host, IDNA_DEFAULT, $variant), '.') . '.';
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$Aresult = true;
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$MXresult = checkdnsrr($host, 'MX');
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if (!$MXresult) {
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$this->warnings[NoDNSMXRecord::CODE] = new NoDNSMXRecord();
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$Aresult = checkdnsrr($host, 'A') || checkdnsrr($host, 'AAAA');
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if (!$Aresult) {
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$this->error = new NoDNSRecord();
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}
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}
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return $MXresult || $Aresult;
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}
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}
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