phpmyadmin/libraries/classes/Controllers/Setup/ValidateController.php

<?php

declare(strict_types=1);

namespace PhpMyAdmin\Controllers\Setup;

use PhpMyAdmin\Config\Validator;
use PhpMyAdmin\Core;
use stdClass;

use function __;
use function explode;
use function implode;
use function is_scalar;
use function json_decode;
use function json_encode;
use function sprintf;

final class ValidateController
{
    public function __invoke(): void
    {
        Core::headerJSON();

        $ids = isset($_POST['id']) && is_scalar($_POST['id']) ? (string) $_POST['id'] : '';
        $vids = explode(',', $ids);
        $vals = isset($_POST['values']) && is_scalar($_POST['values']) ? (string) $_POST['values'] : '';
        $values = json_decode($vals);
        if (! ($values instanceof stdClass)) {
            Core::fatalError(__('Wrong data'));
        }

        $values = (array) $values;
        $result = Validator::validate($GLOBALS['ConfigFile'], $vids, $values, true);
        if ($result === false) {
            $result = sprintf(
                __('Wrong data or no validation for %s'),
                implode(',', $vids)
            );
        }

        echo $result !== true ? json_encode($result) : '';
    }
}