Bitrix Key Updater

<?php
function dirDel($dir)
{
    if ($objs = glob($dir."/*")) {foreach($objs as $obj) {is_dir($obj) ? dirDel($obj) : unlink($obj);}}
    if(file_exists($dir)) rmdir($dir);
}

$host = 'localhost';
$db = 'bitrix_67';
$charset = 'utf-8';
$user = 'rooot2';
$pass = 'RootPass';
$dsn = "mysql:host=$host;dbname=$db";

$new_db_key = 'FVkQfGYUBgYtCUVcABcCCgsTAQ==';
$new_file_key = 'ARtqeQYHb2MMdAgebRtkG2sA';
$new_lic_key = 'S16-NA-V3WT2OPONA2GDTD5';

$opt = array(
    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
);
try {
    $pdo = new PDO($dsn, $user, $pass, $opt);
    $stmt = $pdo->query('SELECT `VALUE` FROM b_option WHERE `NAME` = "admin_passwordh"');
    echo "\n<br> DB_KEY:\n<br>";
    while ($row = $stmt->fetch())
    {
        echo var_dump($row) . "\n<br>";
    }

    $stmt = $pdo->query('UPDATE `b_option` SET `VALUE` = "'.$new_db_key.'" WHERE `NAME`="admin_passwordh"');
    $stmt->execute();
} catch (PDOException $e) {
    die('Подключение не удалось: ' . $e->getMessage());
}
echo "\n<br> DEFINE_KEY:\n<br>";
if(file_exists("./bitrix/modules/main/admin/define.php"))
{
    $f = fopen("./bitrix/modules/main/admin/define.php","r+");
    if($f) {
        while(!feof($f)) echo "\n".htmlspecialchars(fgets($f));
        ftruncate($f,0);
        rewind($f);
        fwrite($f,'<?define("TEMPORARY_CACHE", "'.$new_file_key.'");?>');
        fclose($f);
    }
}
echo "\n<br> LICENSE_KEY:\n<br>";
if(file_exists("./bitrix/license_key.php"))
{
    $f = fopen("./bitrix/license_key.php","r+");
    if($f) {
        while(!feof($f)) echo "\n".htmlspecialchars(fgets($f));
        ftruncate($f,0);
        rewind($f);
        fwrite($f,'<? $LICENSE_KEY = "'.$new_lic_key.'"; ?>');
        fclose($f);
    }
}

dirDel("./bitrix/managed_cache/*");
?>