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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Validator\Rule; |
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use Yiisoft\Validator\Result; |
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use Yiisoft\Validator\ValidationContext; |
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use Yiisoft\Validator\ValidatorInterface; |
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use function is_string; |
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use function strlen; |
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use Yiisoft\Validator\Exception\UnexpectedRuleException; |
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/** |
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* Validates that the value is a valid email address. |
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*/ |
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final class EmailHandler implements RuleHandlerInterface |
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{ |
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public function validate(mixed $value, object $rule, ?ValidationContext $context = null): Result |
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{ |
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if (!$rule instanceof Email) { |
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throw new UnexpectedRuleException(Email::class, $rule); |
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} |
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$originalValue = $value; |
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$result = new Result(); |
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if (!is_string($value)) { |
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$valid = false; |
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} elseif (!preg_match( |
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'/^(?P<name>(?:"?([^"]*)"?\s)?)(?:\s+)?((?P<open><?)((?P<local>.+)@(?P<domain>[^>]+))(?P<close>>?))$/i', |
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$value, |
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$matches |
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)) { |
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$valid = false; |
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} else { |
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/** @psalm-var array{name:string,local:string,open:string,domain:string,close:string} $matches */ |
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if ($rule->enableIDN) { |
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$matches['local'] = $this->idnToAscii($matches['local']); |
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$matches['domain'] = $this->idnToAscii($matches['domain']); |
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$value = implode([ |
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$matches['name'], |
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$matches['open'], |
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$matches['local'], |
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'@', |
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$matches['domain'], |
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$matches['close'], |
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]); |
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} |
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if (is_string($matches['local']) && strlen($matches['local']) > 64) { |
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// The maximum total length of a user name or other local-part is 64 octets. RFC 5322 section 4.5.3.1.1 |
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// http://tools.ietf.org/html/rfc5321#section-4.5.3.1.1 |
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$valid = false; |
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} elseif (is_string($matches['local']) && strlen($matches['local'] . '@' . $matches['domain']) > 254) { |
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// There is a restriction in RFC 2821 on the length of an address in MAIL and RCPT commands |
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// of 254 characters. Since addresses that do not fit in those fields are not normally useful, the |
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// upper limit on address lengths should normally be considered to be 254. |
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// |
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// Dominic Sayers, RFC 3696 erratum 1690 |
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// http://www.rfc-editor.org/errata_search.php?eid=1690 |
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$valid = false; |
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} else { |
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$valid = preg_match($rule->pattern, $value) || ($rule->allowName && preg_match( |
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$rule->fullPattern, |
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$value |
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)); |
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if ($valid && $rule->checkDNS) { |
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$valid = checkdnsrr($matches['domain'] . '.', 'MX') || checkdnsrr($matches['domain'] . '.', 'A'); |
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} |
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} |
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} |
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if ($rule->enableIDN && $valid === false) { |
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$valid = (bool) preg_match($rule->idnEmailPattern, $originalValue); |
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} |
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if ($valid === false) { |
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$result->addError($rule->message); |
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} |
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return $result; |
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} |
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private function idnToAscii($idn) |
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{ |
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return idn_to_ascii($idn, 0, INTL_IDNA_VARIANT_UTS46); |
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} |
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} |
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yiisoft /
validator
