Email

Email

Validates that a value is a valid email address. The underlying value is cast to a string before being validated.

Basic Usage

• Annotations

  // src/Entity/Author.php
  namespace App\Entity;
  use Symfony\Component\Validator\Constraints as Assert;
  class Author
  {
      /**
       * @Assert\Email(
       *     message = "The email '{{ value }}' is not a valid email.",
       *     checkMX = true
       * )
       */
      protected $email;
  }

• YAML

  # config/validator/validation.yaml
  App\Entity\Author:
      properties:
          email:
              - Email:
                  message: The email "{{ value }}" is not a valid email.
                  checkMX: true

• XML

  <!-- config/validator/validation.xml -->
  <?xml version="1.0" encoding="UTF-8" ?>
  <constraint-mapping xmlns="http://symfony.com/schema/dic/constraint-mapping"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://symfony.com/schema/dic/constraint-mapping https://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
      <class name="App\Entity\Author">
          <property name="email">
              <constraint name="Email">
                  <option name="message">The email "{{ value }}" is not a valid email.</option>
                  <option name="checkMX">true</option>
              </constraint>
          </property>
      </class>
  </constraint-mapping>

• PHP

  // src/Entity/Author.php
  namespace App\Entity;
  use Symfony\Component\Validator\Constraints as Assert;
  use Symfony\Component\Validator\Mapping\ClassMetadata;
  class Author
  {
      public static function loadValidatorMetadata(ClassMetadata $metadata)
      {
          $metadata->addPropertyConstraint('email', new Assert\Email([
              'message' => 'The email "{{ value }}" is not a valid email.',
              'checkMX' => true,
          ]));
      }
  }

Note

As with most of the other constraints, null and empty strings are considered valid values. This is to allow them to be optional values. If the value is mandatory, a common solution is to combine this constraint with NotBlank.

Options

checkHost

type: boolean default: false

Deprecated since version 4.2: This option was deprecated in Symfony 4.2.

If true, then the [checkdnsrr](https://www.php.net/manual/en/function.checkdnsrr.php "checkdnsrr") PHP function will be used to check the validity of the MX or the A or the AAAA record of the host of the given email.

checkMX

type: boolean default: false

Deprecated since version 4.2: This option was deprecated in Symfony 4.2.

If true, then the [checkdnsrr](https://www.php.net/manual/en/function.checkdnsrr.php "checkdnsrr") PHP function will be used to check the validity of the MX record of the host of the given email.

Caution

This option is not reliable because it depends on the network conditions and some valid servers refuse to respond to those requests.

groups

type: array | string

It defines the validation group or groups this constraint belongs to. Read more about validation groups.

message

type: string default: This value is not a valid email address.

This message is shown if the underlying data is not a valid email address.

You can use the following parameters in this message:

mode

type: string default: loose

This option is optional and defines the pattern the email address is validated against. Valid values are:

• loose
• strict
• html5

loose

A simple regular expression. Allows all values with an “@” symbol in, and a “.” in the second host part of the email address.

strict

Uses the egulias/email-validator library to perform an RFC compliant validation. You will need to install that library to use this mode.

html5

This matches the pattern used for the HTML5 email input element.

normalizer

type: a PHP callable default: null

This option allows to define the PHP callable applied to the given value before checking if it is valid.

For example, you may want to pass the 'trim' string to apply the [trim](https://www.php.net/manual/en/function.trim.php "trim") PHP function in order to ignore leading and trailing whitespace during validation.

payload

type: mixed default: null

This option can be used to attach arbitrary domain-specific data to a constraint. The configured payload is not used by the Validator component, but its processing is completely up to you.

For example, you may want to use several error levels to present failed constraints differently in the front-end depending on the severity of the error.

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.