Cover of the book Symfony 5: The Fast Track

Symfony 5: The Fast Track is the best book to learn modern Symfony development, from zero to production. +300 pages in full color showing how to combine Symfony with Docker, APIs, queues & async tasks, Webpack, Single-Page Applications, etc.

Buy printed version
Buy PDF version
  1. Home
  2. Documentation
  3. Reference
  4. Constraints
  5. MaxLength
WARNING: You are browsing the documentation for Symfony 2.0 which is not maintained anymore. Consider upgrading your projects to Symfony 5.1.

MaxLength

2.0 version
Unmaintained
2.1 2.2

MaxLength

Validates that the length of a string is not larger than the given limit.

Applies to property or method
Options
Class Symfony\Component\Validator\Constraints\MaxLength
Validator Symfony\Component\Validator\Constraints\MaxLengthValidator

Basic Usage

  • YAML
    1
2
3
4
5
    # src/Acme/BlogBundle/Resources/config/validation.yml
Acme\BlogBundle\Entity\Blog:
    properties:
        summary:
            - MaxLength: 100
  • Annotations
     1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
    // src/Acme/BlogBundle/Entity/Blog.php
namespace Acme\BlogBundle\Entity;

use Symfony\Component\Validator\Constraints as Assert;

class Blog
{
    /**
     * @Assert\MaxLength(100)
     */
    protected $summary;
}
  • XML
    1
2
3
4
5
6
7
8
    <!-- src/Acme/BlogBundle/Resources/config/validation.xml -->
<class name="Acme\BlogBundle\Entity\Blog">
    <property name="summary">
        <constraint name="MaxLength">
            <option name="limit">100</option>
        </constraint>
    </property>
</class>
  • PHP
     1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
    // src/Acme/BlogBundle/Entity/Blog.php
namespace Acme\BlogBundle\Entity;

use Symfony\Component\Validator\Mapping\ClassMetadata;
use Symfony\Component\Validator\Constraints as Assert;

class Blog
{
    public static function loadValidatorMetadata(ClassMetadata $metadata)
    {
        $metadata->addPropertyConstraint('summary', new Assert\MaxLength(array(
            'limit' => 100,
        )));
    }
}

Options

limit

type: integer [default option]

This required option is the “max” value. Validation will fail if the length of the give string is greater than this number.

message

type: string default: This value is too long. It should have {{ limit }} characters or less

The message that will be shown if the underlying string has a length that is longer than the limit option.

charset

type: charset default: UTF-8

If the PHP extension “mbstring” is installed, then the PHP function mb_strlen will be used to calculate the length of the string. The value of the charset option is passed as the second argument to that function.

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