engineN/system/Entity/Cast/JsonCast.php

<?php

/**
 * This file is part of CodeIgniter 4 framework.
 *
 * (c) CodeIgniter Foundation <admin@codeigniter.com>
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

namespace CodeIgniter\Entity\Cast;

use CodeIgniter\Entity\Exceptions\CastException;
use JsonException;
use stdClass;

/**
 * Class JsonCast
 */
class JsonCast extends BaseCast
{
    /**
     * {@inheritDoc}
     */
    public static function get($value, array $params = [])
    {
        $associative = in_array('array', $params, true);

        $tmp = $value !== null ? ($associative ? [] : new stdClass()) : null;

        if (function_exists('json_decode')
            && (
                (is_string($value)
                    && strlen($value) > 1
                    && in_array($value[0], ['[', '{', '"'], true))
                || is_numeric($value)
            )
        ) {
            try {
                $tmp = json_decode($value, $associative, 512, JSON_THROW_ON_ERROR);
            } catch (JsonException $e) {
                throw CastException::forInvalidJsonFormat($e->getCode());
            }
        }

        return $tmp;
    }

    /**
     * {@inheritDoc}
     */
    public static function set($value, array $params = []): string
    {
        if (function_exists('json_encode')) {
            try {
                $value = json_encode($value, JSON_UNESCAPED_UNICODE | JSON_THROW_ON_ERROR);
            } catch (JsonException $e) {
                throw CastException::forInvalidJsonFormat($e->getCode());
            }
        }

        return $value;
    }
}