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Url

Url

Validates that a value is a valid URL string.

Applies to property or method
Options
Class Url
Validator UrlValidator

Basic Usage

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    // src/Entity/Author.php
    namespace App\Entity;
    
    use Symfony\Component\Validator\Constraints as Assert;
    
    class Author
    {
        /**
         * @Assert\Url
         */
        protected $bioUrl;
    }
    
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    # config/validator/validation.yaml
    App\Entity\Author:
        properties:
            bioUrl:
                - Url: ~
    
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    <!-- 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="bioUrl">
                <constraint name="Url"/>
            </property>
        </class>
    </constraint-mapping>
    
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    // 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('bioUrl', new Assert\Url());
        }
    }
    

This constraint doesn't check that the host of the given URL really exists, because the information of the DNS records is not reliable. Use the checkdnsrr PHP function if you still want to check that.

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

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 URL.

This message is shown if the URL is invalid.

You can use the following parameters in this message:

Parameter Description
{{ value }} The current (invalid) value
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    // 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;
    }
    
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    # config/validator/validation.yaml
    App\Entity\Author:
        properties:
            bioUrl:
                - Url:
                    message: The url "{{ value }}" is not a valid url.
    
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    <!-- 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="bioUrl">
                <constraint name="Url">
                    <option name="message">The url "{{ value }}" is not a valid url.</option>
                </constraint>
            </property>
        </class>
    </constraint-mapping>
    
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    // 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('bioUrl', new Assert\Url([
                'message' => 'The url "{{ value }}" is not a valid url.',
            ]));
        }
    }
    

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 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.

protocols

type: array default: ['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.

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    // src/Entity/Author.php
    namespace App\Entity;
    
    use Symfony\Component\Validator\Constraints as Assert;
    
    class Author
    {
        /**
         * @Assert\Url(
         *    protocols = {"http", "https", "ftp"}
         * )
         */
        protected $bioUrl;
    }
    
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    # config/validator/validation.yaml
    App\Entity\Author:
        properties:
            bioUrl:
                - Url: { protocols: [http, https, ftp] }
    
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    <!-- 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="bioUrl">
                <constraint name="Url">
                    <option name="protocols">
                        <value>http</value>
                        <value>https</value>
                        <value>ftp</value>
                    </option>
                </constraint>
            </property>
        </class>
    </constraint-mapping>
    
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    // 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('bioUrl', new Assert\Url([
                'protocols' => ['http', 'https', 'ftp'],
            ]));
        }
    }
    

relativeProtocol

type: boolean default: false

If true, the protocol is considered optional when validating the syntax of the given URL. This means that both http:// and https:// are valid but also relative URLs that contain no protocol (e.g. //example.com).

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    // src/Entity/Author.php
    namespace App\Entity;
    
    use Symfony\Component\Validator\Constraints as Assert;
    
    class Author
    {
        /**
         * @Assert\Url(
         *    relativeProtocol = true
         * )
         */
        protected $bioUrl;
    }
    
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    # config/validator/validation.yaml
    App\Entity\Author:
        properties:
            bioUrl:
                - Url: { relativeProtocol: true }
    
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    <!-- 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="bioUrl">
                <constraint name="Url">
                    <option name="relativeProtocol">true</option>
                </constraint>
            </property>
        </class>
    </constraint-mapping>
    
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    // 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('bioUrl', new Assert\Url([
                'relativeProtocol' => true,
            ]));
        }
    }
    

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