Getting started

Installing JSON Schema Using Composer

The recommended method of installing JSON Schema is using Composer, which installs the required dependencies on a per-project basis.

1composer require justinrainbow/json-schema

Validating using a schema on disk

 1<?php
 2 
 3$data = json_decode(file_get_contents('data.json'));
 4 
 5// Validate
 6$validator = new JsonSchema\Validator;
 7$validator->validate($data, (object)['$ref' => 'file://' . realpath('schema.json')]);
 8 
 9if ($validator->isValid()) {
10    echo "The supplied JSON validates against the schema.\n";
11} else {
12    echo "JSON does not validate. Violations:\n";
13    foreach ($validator->getErrors() as $error) {
14        printf("[%s] %s\n", $error['property'], $error['message']);
15    }
16}

Validating using an inline schema

 1<?php
 2 
 3use JsonSchema\Constraints\Factory;
 4use JsonSchema\SchemaStorage;
 5use JsonSchema\Validator;
 6 
 7require_once './vendor/autoload.php';
 8 
 9$data = json_decode(file_get_contents('data.json'));
10$jsonSchemaAsString = <<<'JSON'
11{
12  "type": "object",
13  "properties": {
14    "name": { "type": "string"},
15    "email": {"type": "string"}
16  },
17  "required": ["name","email"]
18}
19JSON;
20 
21$jsonSchema = json_decode($jsonSchemaAsString);
22$schemaStorage = new SchemaStorage();
23$schemaStorage->addSchema('internal://mySchema', $jsonSchema);
24$validator = new Validator(new Factory($schemaStorage));
25 
26$validator->validate($data, $jsonSchemaObject);
27if ($validator->isValid()) {
28    echo "The supplied JSON validates against the schema.\n";
29} else {
30    echo "JSON does not validate. Violations:\n";
31    foreach ($validator->getErrors() as $error) {
32        printf("[%s] %s\n", $error['property'], $error['message']);
33    }
34}