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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\HasValidationErrorMessage; |
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use Yiisoft\Validator\Result; |
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use Yiisoft\Validator\Rule; |
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use Yiisoft\Validator\ValidationContext; |
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use function function_exists; |
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use function is_string; |
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use function strlen; |
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/** |
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* EmailValidator validates that the attribute value is a valid email address. |
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*/ |
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class Email extends Rule |
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{ |
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use HasValidationErrorMessage; |
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/** |
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* @var string the regular expression used to validateValue the attribute value. |
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* |
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* @see http://www.regular-expressions.info/email.html |
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*/ |
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private string $pattern = '/^[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$/'; |
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/** |
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* @var string the regular expression used to validateValue email addresses with the name part. |
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* This property is used only when {@see allowName()} is true. |
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* |
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* @see allowName |
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*/ |
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private string $fullPattern = '/^[^@]*<[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?>$/'; |
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/** |
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* @var string the regular expression used to validate complex emails when idn is enabled. |
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*/ |
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private string $patternIdnEmail = '/^([a-zA-Z0-9._%+-]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/'; |
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/** |
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* @var bool whether to allow name in the email address (e.g. "John Smith <[email protected]>"). Defaults to false. |
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* |
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* @see fullPattern |
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*/ |
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private bool $allowName = false; |
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/** |
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* @var bool whether to check whether the email's domain exists and has either an A or MX record. |
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* Be aware that this check can fail due to temporary DNS problems even if the email address is |
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* valid and an email would be deliverable. Defaults to false. |
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*/ |
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private bool $checkDNS = false; |
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/** |
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* @var bool whether validation process should take into account IDN (internationalized domain |
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* names). Defaults to false meaning that validation of emails containing IDN will always fail. |
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* Note that in order to use IDN validation you have to install and enable `intl` PHP extension, |
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* otherwise an exception would be thrown. |
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*/ |
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private bool $enableIDN = false; |
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private string $message = 'This value is not a valid email address.'; |
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public static function rule(): self |
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{ |
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return new self(); |
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} |
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protected function validateValue($value, ValidationContext $context = null): Result |
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{ |
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$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} $matches */ |
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if ($this->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 = $matches['name'] . $matches['open'] . $matches['local'] . '@' . $matches['domain'] . $matches['close']; |
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} |
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if (is_string($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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$valid = preg_match($this->pattern, $value) || ($this->allowName && preg_match( |
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$this->fullPattern, |
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$value |
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)); |
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if ($valid && $this->checkDNS) { |
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$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 ($this->enableIDN && $valid === false) { |
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$valid = (bool) preg_match($this->patternIdnEmail, $originalValue); |
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} |
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if ($valid === false) { |
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$result->addError($this->formatMessage($this->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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public function patternIdnEmail(string $patternIdnEmail): self |
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{ |
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$new = clone $this; |
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$new->patternIdnEmail = $patternIdnEmail; |
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return $new; |
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} |
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public function allowName(bool $allowName): self |
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{ |
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$new = clone $this; |
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$new->allowName = $allowName; |
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return $new; |
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} |
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public function checkDNS(bool $checkDNS): self |
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{ |
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$new = clone $this; |
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$new->checkDNS = $checkDNS; |
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return $new; |
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} |
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public function enableIDN(bool $enableIDN): self |
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{ |
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if ($enableIDN && !function_exists('idn_to_ascii')) { |
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throw new \RuntimeException('In order to use IDN validation intl extension must be installed and enabled.'); |
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} |
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$new = clone $this; |
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$new->enableIDN = $enableIDN; |
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return $new; |
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} |
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public function getOptions(): array |
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{ |
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return array_merge( |
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parent::getOptions(), |
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[ |
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'allowName' => $this->allowName, |
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'checkDNS' => $this->checkDNS, |
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'enableIDN' => $this->enableIDN, |
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'message' => $this->formatMessage($this->message), |
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], |
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); |
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} |
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} |
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yiisoft /
validator
