"PHP is now running over a million web sites and with good reason. PHP is
open source, it runs equally well on NT and UNIX, it's well documented.
PHP is no doubt stealing market share from Microsoft's Active Server
Pages, but the media has been unusually quiet about the issue. Even as
Apache's success has become front page news, PHP has gone largely
unnoticed. Maybe Microsoft wants to keep it that way."
"Microsoft is very public with it's worries about Linux and Apache, but it
has yet to say a word about PHP. This is somewhat surprising given the
capabilities and market share of PHP. With it's ability to run on NT and
UNIX, PHP makes it easy to build complex web sites which can run on
either platform...."