Symfony 4 was released on November 30th.
Update now to the best Symfony ever!

You are browsing the Symfony 4 documentation, which changes significantly from Symfony 3.x. If your app doesn't use Symfony 4 yet, browse the Symfony 3.4 documentation.

Url

Url

Validates that a value is a valid URL string.

Applies to property or method
Options
Class Url
Validator UrlValidator

Basic Usage

  • Annotations
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    // src/Entity/Author.php
    namespace App\Entity;
    
    use Symfony\Component\Validator\Constraints as Assert;
    
    class Author
    {
        /**
         * @Assert\Url()
         */
         protected $bioUrl;
    }
    
  • YAML
    1
    2
    3
    4
    5
    # config/validator/validation.yaml
    App\Entity\Author:
        properties:
            bioUrl:
                - Url: ~
    
  • XML
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    <!-- 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 http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
    
        <class name="App\Entity\Author">
            <property name="bioUrl">
                <constraint name="Url" />
            </property>
        </class>
    </constraint-mapping>
    
  • PHP
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    // src/Entity/Author.php
    namespace App\Entity;
    
    use Symfony\Component\Validator\Mapping\ClassMetadata;
    use Symfony\Component\Validator\Constraints as Assert;
    
    class Author
    {
        public static function loadValidatorMetadata(ClassMetadata $metadata)
        {
            $metadata->addPropertyConstraint('bioUrl', new Assert\Url());
        }
    }
    

Options

message

type: string default: This value is not a valid URL.

This message is shown if the URL is invalid.

  • Annotations
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    // src/Entity/Author.php
    namespace App\Entity;
    
    use Symfony\Component\Validator\Constraints as Assert;
    
    class Author
    {
        /**
         * @Assert\Url(
         *    message = "The url '{{ value }}' is not a valid url",
         * )
         */
         protected $bioUrl;
    }
    
  • YAML
    1
    2
    3
    4
    5
    6
    # config/validator/validation.yaml
    App\Entity\Author:
        properties:
            bioUrl:
                - Url:
                    message: The url "{{ value }}" is not a valid url.
    
  • XML
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    <!-- 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 http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
    
        <class name="App\Entity\Author">
            <property name="bioUrl">
                <constraint name="Url">
                    <option name="message">The url "{{ value }}" is not a valid url.</option>
                </constraint>
            </property>
        </class>
    </constraint-mapping>
    
  • PHP
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    15
    // src/Entity/Author.php
    namespace App\Entity;
    
    use Symfony\Component\Validator\Mapping\ClassMetadata;
    use Symfony\Component\Validator\Constraints as Assert;
    
    class Author
    {
        public static function loadValidatorMetadata(ClassMetadata $metadata)
        {
            $metadata->addPropertyConstraint('bioUrl', new Assert\Url(array(
                'message' => 'The url "{{ value }}" is not a valid url.',
            )));
        }
    }
    

protocols

type: array default: array('http', 'https')

The protocols considered to be valid for the URL. For example, if you also consider the ftp:// type URLs to be valid, redefine the protocols array, listing http, https, and also ftp.

  • Annotations
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    // src/Entity/Author.php
    namespace App\Entity;
    
    use Symfony\Component\Validator\Constraints as Assert;
    
    class Author
    {
        /**
         * @Assert\Url(
         *    protocols = {"http", "https", "ftp"}
         * )
         */
         protected $bioUrl;
    }
    
  • YAML
    1
    2
    3
    4
    5
    # config/validator/validation.yaml
    App\Entity\Author:
        properties:
            bioUrl:
                - Url: { protocols: [http, https, ftp] }
    
  • XML
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    <!-- 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 http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
    
        <class name="App\Entity\Author">
            <property name="bioUrl">
                <constraint name="Url">
                    <option name="protocols">
                        <value>http</value>
                        <value>https</value>
                        <value>ftp</value>
                    </option>
                </constraint>
            </property>
        </class>
    </constraint-mapping>
    
  • PHP
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    15
    // src/Entity/Author.php
    namespace App\Entity;
    
    use Symfony\Component\Validator\Mapping\ClassMetadata;
    use Symfony\Component\Validator\Constraints as Assert;
    
    class Author
    {
        public static function loadValidatorMetadata(ClassMetadata $metadata)
        {
            $metadata->addPropertyConstraint('bioUrl', new Assert\Url(array(
                'protocols' => array('http', 'https', 'ftp'),
            )));
        }
    }
    

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.

checkDNS

type: boolean default: false

By default, this constraint just validates the syntax of the given URL. If you also need to check whether the associated host exists, set the checkDNS option to true:

  • Annotations
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    // src/Entity/Author.php
    namespace App\Entity;
    
    use Symfony\Component\Validator\Constraints as Assert;
    
    class Author
    {
        /**
         * @Assert\Url(
         *    checkDNS = true
         * )
         */
         protected $bioUrl;
    }
    
  • YAML
    1
    2
    3
    4
    5
    # config/validator/validation.yaml
    App\Entity\Author:
        properties:
            bioUrl:
                - Url: { checkDNS: true }
    
  • XML
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    <!-- 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 http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
    
        <class name="App\Entity\Author">
            <property name="bioUrl">
                <constraint name="Url">
                    <option name="checkDNS">true</option>
                </constraint>
            </property>
        </class>
    </constraint-mapping>
    
  • PHP
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    15
    // src/Entity/Author.php
    namespace App\Entity;
    
    use Symfony\Component\Validator\Mapping\ClassMetadata;
    use Symfony\Component\Validator\Constraints as Assert;
    
    class Author
    {
        public static function loadValidatorMetadata(ClassMetadata $metadata)
        {
            $metadata->addPropertyConstraint('bioUrl', new Assert\Url(array(
                'checkDNS'  => true,
            )));
        }
    }
    

This option uses the checkdnsrr PHP function to check the validity of the ANY DNS record corresponding to the host associated with the given URL.

dnsMessage

type: string default: The host could not be resolved.

This message is shown when the checkDNS option is set to true and the DNS check failed.

  • Annotations
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    // src/Entity/Author.php
    namespace App\Entity;
    
    use Symfony\Component\Validator\Constraints as Assert;
    
    class Author
    {
        /**
         * @Assert\Url(
         *    dnsMessage = "The host '{{ value }}' could not be resolved."
         * )
         */
         protected $bioUrl;
    }
    
  • YAML
    1
    2
    3
    4
    5
    # config/validator/validation.yaml
    App\Entity\Author:
        properties:
            bioUrl:
                - Url: { dnsMessage: 'The host "{{ value }}" could not be resolved.' }
    
  • XML
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    <!-- 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 http://symfony.com/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd">
    
        <class name="App\Entity\Author">
            <property name="bioUrl">
                <constraint name="Url">
                    <option name="dnsMessage">The host "{{ value }}" could not be resolved.</option>
                </constraint>
            </property>
        </class>
    </constraint-mapping>
    
  • PHP
     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    15
    // src/Entity/Author.php
    namespace App\Entity;
    
    use Symfony\Component\Validator\Mapping\ClassMetadata;
    use Symfony\Component\Validator\Constraints as Assert;
    
    class Author
    {
        public static function loadValidatorMetadata(ClassMetadata $metadata)
        {
            $metadata->addPropertyConstraint('bioUrl', new Assert\Url(array(
                 'dnsMessage' => 'The host "{{ value }}" could not be resolved.',
            )));
        }
    }
    

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