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<?php
/**
* This file is part of the Nette Framework (http://nette.org)
*
* Copyright (c) 2004 David Grudl (http://davidgrudl.com)
*
* For the full copyright and license information, please view
* the file license.txt that was distributed with this source code.
*/
namespace Nette\Utils;
use Nette;
/**
* JSON encoder and decoder.
*
* @author David Grudl
*/
final class Json
{
const FORCE_ARRAY = 1;
/** @var array */
private static $messages = array(
JSON_ERROR_DEPTH => 'The maximum stack depth has been exceeded',
JSON_ERROR_STATE_MISMATCH => 'Syntax error, malformed JSON',
JSON_ERROR_CTRL_CHAR => 'Unexpected control character found',
JSON_ERROR_SYNTAX => 'Syntax error, malformed JSON',
);
/**
* Static class - cannot be instantiated.
*/
final public function __construct()
{
throw new Nette\StaticClassException;
}
/**
* Returns the JSON representation of a value.
* @param mixed
* @return string
*/
public static function encode($value)
{
if (function_exists('ini_set')) { // workaround for PHP bugs #52397, #54109, #63004
$old = ini_set('display_errors', 0); // needed to receive 'Invalid UTF-8 sequence' error
}
set_error_handler(function($severity, $message) { // needed to receive 'recursion detected' error
restore_error_handler();
throw new JsonException($message);
});
$json = json_encode($value);
restore_error_handler();
if (isset($old)) {
ini_set('display_errors', $old);
}
return $json;
}
/**
* Decodes a JSON string.
* @param string
* @param int
* @return mixed
*/
public static function decode($json, $options = 0)
{
$json = (string) $json;
$value = json_decode($json, (bool) ($options & self::FORCE_ARRAY));
if ($value === NULL && $json !== '' && strcasecmp($json, 'null')) { // '' do not clean json_last_error
$error = PHP_VERSION_ID >= 50300 ? json_last_error() : 0;
throw new JsonException(isset(static::$messages[$error]) ? static::$messages[$error] : 'Unknown error', $error);
}
return $value;
}
}
/**
* The exception that indicates error of JSON encoding/decoding.
*/
class JsonException extends \Exception
{
}
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