Please try using this CVS snapshot:

  http://snaps.php.net/php4-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php4-win32-latest.zip

I've download latest tar (php4-200210030000), Apache starts without problems ;-)) but ... the pre-processor dont work :-((
Perhaps, I have bad configuration ?
I use these lines in my httpd.conf file :
-----------------
<IfModule mod_so.c>
        LoadModule php4_module        modules/libphp4.so
</IfModule>
<IfModule mod_php4.c>
        AddType application/x-httpd-php .php .php3 .phps
# First try :
        AddInputFilter PHP .php .php3 .phps
        AddOutputFilter PHP .php .php3 .phps
# Second try :
        <Files *.php>
                SetInputFilter PHP
                SetOutputFilter PHP
        </Files>
        php_flag safe_mode on
</IfModule>
--------------------

Dont care about my poor english (french guy) and thank's for all.
--
                                            Ivan

Precision :
When I wrote "dont work", I mean than any <? php statement ?>
is processed. The HTML file is delivered as it is.

You only need the 'LoadModule' and 'AddType' lines..

If I put only the lines :
--
LoadModule php4_module        modules/libphp4.so
AddType application/x-httpd-php .php .php3 .phps
--
It's still not working. nada...

Did you stop/start apache after changing this? And I don't mean 'restart' but real 'apachectl stop' and 'apachectl start' ?

Also, are you sure you don't have short-tags disabled?
Try this script:

test.php
<?php phpinfo(); ?>


And make sure that 'Addtype' line is LAST line in the apache conf..

I stop and start the server evry time I make a test.

I've compiled with short-tags :
./configure  --with-apache2 --with-apxs2=/usr/local/apache2/bin/apxs --with-pgsql --with-ldap --with-mysql=/usr/local/mysql --with-tsrm-pth --enable-short-tags

I put the line
AddType application/x-httpd-php .php .php3 .phps
at the end of my http.conf file
And nothing...
The Type seems to be recognized : mozilla display the content of the php file. If I dont add the Type; mozilla
ask me what to do with this unknow type file.
The module seems to be present, but it parse nothing...

Apache2+PHP 4.2.x are nowhere near production quality.  Try the latest CVS snapshot from snaps.php.net.  But, even that will not be very stable.  We suggest you stick with Apache 1.3.x if you are going to use PHP.

It works !

In the httpd.conf file, I've only the line :
LoadModule php4_module        modules/libphp4.so
I added a new line in the mime.types :
application/x-httpd-php         php php3 phps
and it works... I dont know really why, but It seems ok.

Thank you.