What version of PHP/MySQL? I just retrieve maintenance (archive FTP/SQL) of a website running Drupal 6.22…

But… I have an Debian 8 server with Apache 2.4, PHP 5.6 and MySQL 5.5... :)

==> So my question is : what is the upper version of these software (Apache, PHP, MySQL) can run Drupal 6.22 ?
I think PHP 5.3, but after ? 
(I know that 6.22 is an old version but I will update after first run).

Really thanks for your help.
Per the d.o. requirements page, D6's requirements are:


Web server: Apache, Nginx, or Microsoft IIS
Database: MySQL 4.1 or higher, PostgreSQL 7.1,
PHP: PHP 5.x only (5.2.5 or higher recommended). Warning: support for PHP 4.x has been dropped. Drupal core should work with PHP 5.3.x, but PHP 5.3.x and higher may produce errors or unexpected behavior especially for contributed modules and themes.