json msg

json-msg.php

<?php

if (!function_exists('json_last_error_msg')) {
    function json_last_error_msg() {
        static $errors = array(
            JSON_ERROR_NONE             => null,
            JSON_ERROR_DEPTH            => 'Maximum stack depth exceeded',
            JSON_ERROR_STATE_MISMATCH   => 'Underflow or the modes mismatch',
            JSON_ERROR_CTRL_CHAR        => 'Unexpected control character found',
            JSON_ERROR_SYNTAX           => 'Syntax error, malformed JSON',
            JSON_ERROR_UTF8             => 'Malformed UTF-8 characters, possibly incorrectly encoded'
        );
        $error = json_last_error();
        return array_key_exists($error, $errors) ? $errors[$error] : "Unknown error ({$error})";
    }
}