Hmm,
On one of our servers, PHP was previously built with PHP 5 as CGI, and PHP 4 as CLI, but because PHP 5.2.5 is not compatible with Ioncube encoders, it was changed to PHP 4 as CGI, and PHP 5 as CLI.
However now it's currently got:
#PHP settings. default_php possible values - 4 or 5...