Yii2 Bootstrap 3
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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
*/
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namespace yii\validators;
use Yii;
use yii\base\InvalidConfigException;
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/**
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* CaptchaValidator validates that the attribute value is the same as the verification code displayed in the CAPTCHA.
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*
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* CaptchaValidator should be used together with [[CaptchaAction]].
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*
* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class CaptchaValidator extends Validator
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{
/**
* @var boolean whether the comparison is case sensitive. Defaults to false.
*/
public $caseSensitive = false;
/**
* @var string the route of the controller action that renders the CAPTCHA image.
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*/
public $captchaAction = 'site/captcha';
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/**
* Validates the attribute of the object.
* If there is any error, the error message is added to the object.
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* @param \yii\base\Model $object the object being validated
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* @param string $attribute the attribute being validated
*/
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public function validateAttribute($object, $attribute)
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{
$value = $object->$attribute;
if (!$this->validateValue($value)) {
$message = $this->message !== null ? $this->message : Yii::t('yii|The verification code is incorrect.');
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$this->addError($object, $attribute, $message);
}
}
/**
* Validates the given value.
* @param mixed $value the value to be validated.
* @return boolean whether the value is valid.
*/
public function validateValue($value)
{
$captcha = $this->getCaptchaAction();
return $captcha->validate($value, $this->caseSensitive);
}
/**
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* Returns the CAPTCHA action object.
* @return CaptchaAction the action object
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*/
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public function getCaptchaAction()
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{
$ca = Yii::$app->createController($this->captchaAction);
if ($ca !== false) {
/** @var \yii\base\Controller $controller */
list($controller, $actionID) = $ca;
$action = $controller->createAction($actionID);
if ($action !== null) {
return $action;
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}
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}
throw new InvalidConfigException('Invalid CAPTCHA action ID: ' . $this->captchaAction);
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}
/**
* Returns the JavaScript needed for performing client-side validation.
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* @param \yii\base\Model $object the data object being validated
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* @param string $attribute the name of the attribute to be validated.
* @return string the client-side validation script.
*/
public function clientValidateAttribute($object, $attribute)
{
$captcha = $this->getCaptchaAction();
$message = $this->message !== null ? $this->message : \Yii::t('yii|The verification code is incorrect.');
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$message = strtr($message, array(
'{attribute}' => $object->getAttributeLabel($attribute),
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'{value}' => $object->$attribute,
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));
$code = $captcha->getVerifyCode(false);
$hash = $captcha->generateValidationHash($this->caseSensitive ? $code : strtolower($code));
$js = "
var hash = $('body').data(' {$this->captchaAction}.hash');
if (hash == null)
hash = $hash;
else
hash = hash[" . ($this->caseSensitive ? 0 : 1) . "];
for(var i=value.length-1, h=0; i >= 0; --i) h+=value." . ($this->caseSensitive ? '' : 'toLowerCase().') . "charCodeAt(i);
if(h != hash) {
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messages.push(" . json_encode($message) . ");
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}
";
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if ($this->allowEmpty) {
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$js = "
if($.trim(value)!='') {
$js
}
";
}
return $js;
}
}