* @since 2.0 */ class EmailValidator extends Validator { /** * @var string the regular expression used to validate the attribute value. * @see http://www.regular-expressions.info/email.html */ public $pattern = '/^[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$/'; /** * @var string the regular expression used to validate email addresses with the name part. * This property is used only when [[allowName]] is true. * @see allowName */ public $fullPattern = '/^[^@]*<[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+\\/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?>$/'; /** * @var boolean whether to allow name in the email address (e.g. "John Smith "). Defaults to false. * @see fullPattern */ public $allowName = false; /** * @var boolean whether to check whether the email's domain exists and has either an A or MX record. * Be aware that this check can fail due to temporary DNS problems even if the email address is * valid and an email would be deliverable. Defaults to false. */ public $checkDNS = false; /** * @var boolean whether validation process should take into account IDN (internationalized domain * names). Defaults to false meaning that validation of emails containing IDN will always fail. * Note that in order to use IDN validation you have to install and enable `intl` PHP extension, * otherwise an exception would be thrown. */ public $enableIDN = false; /** * @inheritdoc */ public function init() { parent::init(); if ($this->enableIDN && !function_exists('idn_to_ascii')) { throw new InvalidConfigException('In order to use IDN validation intl extension must be installed and enabled.'); } if ($this->message === null) { $this->message = Yii::t('yii', '{attribute} is not a valid email address.'); } } /** * @inheritdoc */ protected function validateValue($value) { if (!is_string($value)) { $valid = false; } elseif (!preg_match('/^(?P(?:"?([^"]*)"?\s)?)(?:\s+)?(?:(?P.+)@(?P[^>]+))(?P>?))$/i', $value, $matches)) { $valid = false; } else { if ($this->enableIDN) { $matches['local'] = idn_to_ascii($matches['local']); $matches['domain'] = idn_to_ascii($matches['domain']); $value = $matches['name'] . $matches['open'] . $matches['local'] . '@' . $matches['domain'] . $matches['close']; } if (strlen($matches['local']) > 64) { // The maximum total length of a user name or other local-part is 64 octets. RFC 5322 section 4.5.3.1.1 // http://tools.ietf.org/html/rfc5321#section-4.5.3.1.1 $valid = false; } elseif (strlen($matches['local'] . '@' . $matches['domain']) > 254) { // There is a restriction in RFC 2821 on the length of an address in MAIL and RCPT commands // of 254 characters. Since addresses that do not fit in those fields are not normally useful, the // upper limit on address lengths should normally be considered to be 254. // // Dominic Sayers, RFC 3696 erratum 1690 // http://www.rfc-editor.org/errata_search.php?eid=1690 $valid = false; } else { $valid = preg_match($this->pattern, $value) || $this->allowName && preg_match($this->fullPattern, $value); if ($valid && $this->checkDNS) { $valid = checkdnsrr($matches['domain'], 'MX') || checkdnsrr($matches['domain'], 'A'); } } } return $valid ? null : [$this->message, []]; } /** * @inheritdoc */ public function clientValidateAttribute($model, $attribute, $view) { $options = [ 'pattern' => new JsExpression($this->pattern), 'fullPattern' => new JsExpression($this->fullPattern), 'allowName' => $this->allowName, 'message' => Yii::$app->getI18n()->format($this->message, [ 'attribute' => $model->getAttributeLabel($attribute), ], Yii::$app->language), 'enableIDN' => (bool)$this->enableIDN, ]; if ($this->skipOnEmpty) { $options['skipOnEmpty'] = 1; } ValidationAsset::register($view); if ($this->enableIDN) { PunycodeAsset::register($view); } return 'yii.validation.email(value, messages, ' . Json::htmlEncode($options) . ');'; } }