Yii cactiverecord 如何检查数据库中是否存在记录

在yii中，我使用安全问题创建密码重置功能。首先，用户需要输入他的电子邮件id。我在

views->User1

as中创建了emailform.php

<?php
$form=$this->beginWidget('CActiveForm', array(
    'id'=>'email-form',
    'enableClientValidation'=>true,
    ));
echo CHtml::textField('email');
echo CHtml::submitButton('Send');
$this->endWidget();

---

现在我想检查用户表中是否存在此电子邮件id。如果有，那么我想向他展示一个安全问题。如何实现这一点？

这将帮助您开始，您可以在控制器中放置类似的方法，并创建一个带有密码字段的视图

public function actionPassword() {
  if(isset($_POST['email'])) {
    $record=User::model()->find(array(
      'select'=>'email',
      'condition'=>'email=:email',
      'params'=>array(':email'=>$_POST['email']))
    );

    if($record===null) {
      $error = 'Email invalid';
    } else {
      $newpassword = 'newrandomgeneratedpassword';
      $record->password = $this->hash_password_secure($newpassword);
      $record->save(); //you might have some issues with the user model when the password is protected for security
      //Email new password to user
    }
  } else {
    $this->render('forgetPassword'); //show the view with the password field
  }
}

这与PDO类似：

$query = 'SELECT * etc.. WHERE email = :email';

$stmt = DB::prepare($query);
$stmt->bindParam(':email', $_POST['email'], PDO::PARAM_STR);
$stmt->execute();

etc...

这不安全

然后

if( empty($model) )
{
  // exit code
}
else
{
  // success block
}

---

如果您使用的是CActiveRecords，检查记录是否存在的正确方法是使用函数，而不是find（）函数

$condition = 'email_d=:emailId';
$params = array(':emailId' => $emailId);
$emailExists = User::model()->exists($condition,$params);
if( $emailExists) )
{
  //email exists
}
else
{
  // email doesn't exist
}

---

要检查数据库中的记录，可以使用两个选项

$exists = ModelName::find()->where([ 'column_name' => $value])->andWhere(['column_name' => $value])->exists();
//returns true or false

及

检查

---

但是请，请，请不要使用md5来保护密码！同意，首选Bcrypt。这只是一个例子。

$condition = 'email_d=:emailId';
$params = array(':emailId' => $emailId);
$emailExists = User::model()->exists($condition,$params);
if( $emailExists) )
{
  //email exists
}
else
{
  // email doesn't exist
}

$exists = ModelName::find()->where([ 'column_name' => $value])->andWhere(['column_name' => $value])->exists();
//returns true or false

$exists = ModelName::findOne(["column_name" => $value,"column_name"=>$value]);

if ($exists)
{
// exit
}
else
{
// not exist
}