README

JSON Lint for PHP checks a string for invalid or malformed JSON, control character error, incorrect encoding or just plain old syntax errors. It returns comprehensive feedback in a one-line error message (one-line message especially meant for REST APIs) about the first error that occurred in the (JSON) string. It supports both RFC 4627 and (its superseding) RFC 7159.

Usage

use CMPayments\JsonLint\JsonLinter;

$linter = new JsonLinter();

// example JSON
$json = '{
    "id": 2,
    "name": "JSON Parser test",
    \'dimensions\': {
        "length": 7.0,
        "width": 12.0,
        "height": 9.5
    }
}';

// returns null if it's valid json, or a ParseException object.
$result = $linter->lint($json);

// Call $result->getMessage() on the ParseException object to get a well formatted error message error like this:
// You used single quotes instead of double quotes on string 'dimensions' on line 4 at column 9. It appears you have an extra trailing comma

// Call $result->getDetails() on the exception to get more info.
$result->getDetails();

// $result->getDetails() returns;
array (size=6)
  'errorCode' => int 3
  'match' => string 'dimensions' (length=10)
  'token' => string 'INVALID' (length=7)
  'line' => int 3
  'column' => int 9
  'expected' =>
    array (size=1)
      0 => string 'STRING' (length=6)

Installation

For a quick install with Composer use:

$ composer require cmpayments/jsonlint

JSON Lint for PHP can easily be used within another app if you have a PSR-4 autoloader, or it can be installed through Composer.

Requirements

• PHP 5.4+
• [optional] PHPUnit 3.5+ to execute the test suite (phpunit --version)

Submitting bugs and feature requests

Bugs and feature request are tracked on GitHub

Todo

• Add support for keys without double quotes*

*RFC 4627 states that an object is an unordered collection of zero or more key/value pairs, where a key is a string and a value is a string, number, boolean, null, object, or array. This JSON linter tends to be more lenient towards keys without quotes in order to accept request from a JavaScript frontend.

Author

Boy Wijnmaalen - boy.wijnmaalen@cmtelecom.com - https://twitter.com/boywijnmaalen

License

JSON Lint is licensed under the MIT License - see the LICENSE file for details

Acknowledgements

This library is based on Seldaek/jsonlint and zaach/jsonlint.