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<?php |
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/** |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright (c) 2008 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\validators; |
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use Yii; |
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use yii\base\ErrorException; |
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use yii\base\InvalidConfigException; |
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use yii\helpers\Json; |
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use yii\web\JsExpression; |
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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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* @author Qiang Xue <[email protected]> |
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* @since 2.0 |
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*/ |
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class EmailValidator extends Validator |
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{ |
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/** |
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* @var string the regular expression used to validate the attribute value. |
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* @see http://www.regular-expressions.info/email.html |
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*/ |
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public $pattern = '/^[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[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 validate email addresses with the name part. |
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* This property is used only when [[allowName]] is true. |
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* @see allowName |
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*/ |
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public $fullPattern = '/^[^@]*<[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[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 bool whether to allow name in the email address (e.g. "John Smith <[email protected]>"). Defaults to false. |
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* @see fullPattern |
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*/ |
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public $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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public $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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public $enableIDN = false; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function init() |
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{ |
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parent::init(); |
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if ($this->enableIDN && !function_exists('idn_to_ascii')) { |
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throw new InvalidConfigException('In order to use IDN validation intl extension must be installed and enabled.'); |
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} |
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if ($this->message === null) { |
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$this->message = Yii::t('yii', '{attribute} is not a valid email address.'); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function validateValue($value) |
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{ |
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if (!is_string($value)) { |
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$valid = false; |
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} elseif (!preg_match('/^(?P<name>(?:"?([^"]*)"?\s)?)(?:\s+)?(?:(?P<open><?)((?P<local>.+)@(?P<domain>[^>]+))(?P<close>>?))$/i', $value, $matches)) { |
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$valid = false; |
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} else { |
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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'] . $matches['close']; |
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} |
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if (strlen($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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$valid = false; |
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} elseif (strlen($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($this->fullPattern, $value)); |
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if ($valid && $this->checkDNS) { |
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$valid = $this->isDNSValid($matches['domain']); |
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} |
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} |
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} |
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return $valid ? null : [$this->message, []]; |
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} |
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/** |
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* @param string $domain |
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* @return bool if DNS records for domain are valid |
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* @see https://github.com/yiisoft/yii2/issues/17083 |
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*/ |
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protected function isDNSValid($domain) |
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{ |
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return $this->hasDNSRecord($domain, true) || $this->hasDNSRecord($domain, false); |
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} |
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private function hasDNSRecord($domain, $isMX) |
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{ |
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$normalizedDomain = $domain . '.'; |
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if (!checkdnsrr($normalizedDomain, ($isMX ? 'MX' : 'A'))) { |
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return false; |
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} |
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try { |
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// dns_get_record can return false and emit Warning that may or may not be converted to ErrorException |
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$records = dns_get_record($normalizedDomain, ($isMX ? DNS_MX : DNS_A)); |
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} catch (ErrorException $exception) { |
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return false; |
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} |
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1 |
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return !empty($records); |
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} |
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private function idnToAscii($idn) |
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{ |
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if (PHP_VERSION_ID < 50600) { |
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// TODO: drop old PHP versions support |
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return idn_to_ascii($idn); |
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} |
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return idn_to_ascii($idn, IDNA_NONTRANSITIONAL_TO_ASCII, INTL_IDNA_VARIANT_UTS46); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function clientValidateAttribute($model, $attribute, $view) |
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{ |
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ValidationAsset::register($view); |
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if ($this->enableIDN) { |
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PunycodeAsset::register($view); |
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} |
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$options = $this->getClientOptions($model, $attribute); |
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return 'yii.validation.email(value, messages, ' . Json::htmlEncode($options) . ');'; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getClientOptions($model, $attribute) |
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{ |
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$options = [ |
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'pattern' => new JsExpression($this->pattern), |
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'fullPattern' => new JsExpression($this->fullPattern), |
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'allowName' => $this->allowName, |
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'message' => $this->formatMessage($this->message, [ |
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'attribute' => $model->getAttributeLabel($attribute), |
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]), |
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'enableIDN' => (bool) $this->enableIDN, |
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]; |
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if ($this->skipOnEmpty) { |
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$options['skipOnEmpty'] = 1; |
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} |
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return $options; |
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} |
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} |
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yiisoft /
yii2
