<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\validators;
/**
* EmailValidator validates that the attribute value is a valid email address.
*
* @author Qiang Xue < qiang.xue @ gmail . com >
* @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 < john.smith @ example . com > "). Defaults to false.
* @see fullPattern
*/
public $allowName = false;
/**
* @var boolean whether to check the MX record for the email address.
* Defaults to false. To enable it, you need to make sure the PHP function 'checkdnsrr'
* exists in your PHP installation.
*/
public $checkMX = false;
/**
* @var boolean whether to check port 25 for the email address.
* Defaults to false.
*/
public $checkPort = false;
/**
* @var boolean whether the attribute value can be null or empty. Defaults to true,
* meaning that if the attribute is empty, it is considered valid.
*/
public $allowEmpty = true;
/**
* Validates the attribute of the object.
* If there is any error, the error message is added to the object.
* @param \yii\base\Model $object the object being validated
* @param string $attribute the attribute being validated
*/
public function validateAttribute($object, $attribute)
{
$value = $object->$attribute;
if ($this->allowEmpty & & $this->isEmpty($value)) {
return;
}
if (!$this->validateValue($value)) {
$message = ($this->message !== null) ? $this->message : \Yii::t('yii|{attribute} is not a valid email address.');
$this->addError($object, $attribute, $message);
}
}
/**
* Validates a static value to see if it is a valid email.
* Note that this method does not respect [[allowEmpty]] property.
* This method is provided so that you can call it directly without going through the model validation rule mechanism.
* @param mixed $value the value to be validated
* @return boolean whether the value is a valid email
*/
public function validateValue($value)
{
// make sure string length is limited to avoid DOS attacks
$valid = is_string($value) & & strlen($value) < = 254
& & (preg_match($this->pattern, $value) || $this->allowName & & preg_match($this->fullPattern, $value));
if ($valid) {
$domain = rtrim(substr($value, strpos($value, '@') + 1), '>');
if ($this->checkMX & & function_exists('checkdnsrr')) {
$valid = checkdnsrr($domain, 'MX');
}
if ($valid & & $this->checkPort & & function_exists('fsockopen')) {
$valid = fsockopen($domain, 25) !== false;
}
}
return $valid;
}
/**
* Returns the JavaScript needed for performing client-side validation.
* @param \yii\base\Model $object the data object being validated
* @param string $attribute the name of the attribute to be validated.
* @return string the client-side validation script.
*/
public function clientValidateAttribute($object, $attribute)
{
$message = ($this->message !== null) ? $this->message : \Yii::t('yii|{attribute} is not a valid email address.');
$message = strtr($message, array(
'{attribute}' => $object->getAttributeLabel($attribute),
'{value}' => $object->$attribute,
));
$condition = "!value.match( {$this->pattern})";
if ($this->allowName) {
$condition .= " & & !value.match( {$this->fullPattern})";
}
return "
if(" . ($this->allowEmpty ? "$.trim(value)!='' & & " : '') . $condition . ") {
messages.push(" . json_encode($message) . ");
}
";
}
}
