This package contains a JSON schema validator library for PHP. It support Draft 07 and 06.

To get a grip on JSON schema's, what they are and how they work, please see the manual of json-schema-org.

The package generates a reusable validation object, which can be used to verify data against.

To install the package run the following command:

composer require ulrack/json-schema

Before a validation object can be created, the factory for the validators needs to be instantiated. This can be done by using the following snippet:

<?php

use Ulrack\JsonSchema\Factory\SchemaValidatorFactory;

$factory = new SchemaValidatorFactory();

All of the below described method of generating a validation object will result in a ValidatorInterface. To verify data against this object, simply pass the data to the __invoke method, like so:

<?php

use GrizzIt\Validator\Common\ValidatorInterface;

/** @var ValidatorInterface $validator */
$validator($myData); // returns true or false.

After the factory is created there are 4 options to create the validation object.

If an object is already created by a (for example) a previous call to json_decode (second parameter must be either null or false, to get an object).

The validation object can be created by calling the create method on the previously instantiated SchemaValidatorFactory.

<?php

use Ulrack\JsonSchema\Factory\SchemaValidatorFactory;

/** @var object|bool $schema */
/** @var SchemaValidatorFactory $factory */
$factory->create($schema);

It is also possible to create a verified validation object. This is possible when the $schema property is set on the provided schema. The schema will then be validated against the schema which is defined on the property. This can be done with the following snippet:

<?php

use Ulrack\JsonSchema\Factory\SchemaValidatorFactory;

/** @var object|bool $schema */
/** @var SchemaValidatorFactory $factory */
$factory->createVerifiedValidator($schema);

To create a validator object from a local schema file, it is also possible to reference this file location to a method and let this method load it. This can be done with the following snippet:

<?php

use Ulrack\JsonSchema\Factory\SchemaValidatorFactory;

/** @var SchemaValidatorFactory $factory */
$factory->createFromLocalFile('path/to/my/schema.json');

A schema can also be loaded from a remote location, for example: http://json-schema.org/draft-07/schema#. To load a schema from a remote location, use the following method:

<?php

use Ulrack\JsonSchema\Factory\SchemaValidatorFactory;

/** @var SchemaValidatorFactory $factory */
$factory->createFromRemoteFile('http://json-schema.org/draft-07/schema#');

If a validation object needs to be created from a JSON string, use the method createFromString.

<?php

use Ulrack\JsonSchema\Factory\SchemaValidatorFactory;

/** @var SchemaValidatorFactory $factory */
$factory->createFromString(
    '{"$ref": "http://json-schema.org/draft-07/schema#"}'
);

Please see CHANGELOG for more information on what has changed recently.

Please see CONTRIBUTING and CODE_OF_CONDUCT for details.

Copyright (c) GrizzIT

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.