Cast.php

<?php
/**
 * Cast language strings.
 *
 * @package    CodeIgniter
 * @author     CodeIgniter Dev Team
 * @copyright  2014-2019 British Columbia Institute of Technology (https://bcit.ca/)
 * @license    https://opensource.org/licenses/MIT	MIT License
 * @link       https://codeigniter.com
 * @since      Version 3.0.0
 * @filesource
 *
 * @codeCoverageIgnore
 */

return [
   'jsonErrorDepth'         => 'Maximum stack depth exceeded',
   'jsonErrorStateMismatch' => 'Underflow or the modes mismatch',
   'jsonErrorCtrlChar'      => 'Unexpected control character found',
   'jsonErrorSyntax'        => 'Syntax error, malformed JSON',
   'jsonErrorUtf8'          => 'Malformed UTF-8 characters, possibly incorrectly encoded',
   'jsonErrorUnknown'       => 'Unknown error',
];