Browser randomly displays php source instead of supposed output

Hello.

Randomly the php-source is displayed instead of the output
(http://www.engstringen.ch/).
Generally, the output is correct !!! It happens sometimes after 10 minutes
of browsing. Sometimes it comes up with the first clikc on the site.

This was the case when having installed apache 1.3 und php 4.1.

After ugrading to apache 2 and php 4.3.4 the bug still occurs. But the
browser shows now a file download dialog box for downloading the php -script
instead of having executed it !!!
The header of the response contains the php - mime type configured
application/x-httpd-php.

The apache config contains
AddType application/x-httpd-php .php .php4 .php3 .phtml
AddType application/x-httpd-php-source .phps
Include conf/confixx_vhost.conf

The confixx_vhost.conf contains lots of virtual host configured on a named
vhost basis.

php is minimally configured with
'./configure' '--with-mysql' '--with-apxs'

Linux version Linux 2.4.20.

Thanks for any hint
Stephan

--------------------------------------------------------------------------
Gloor Informatik Zurlindenstr. 215 a 8003 Zürich
Tel: 01 461 24 11 Fax: 01
461 22 39 info@gli.ch

Stephan Gloor wrote:
> Hello.
>
> Randomly the php-source is displayed instead of the output
> (http://www.engstringen.ch/).
> Generally, the output is correct !!! It happens sometimes after 10 minutes
> of browsing. Sometimes it comes up with the first clikc on the site.
>
> This was the case when having installed apache 1.3 und php 4.1.
>
> After ugrading to apache 2 and php 4.3.4 the bug still occurs. But the
> browser shows now a file download dialog box for downloading the php -script
> instead of having executed it !!!
> The header of the response contains the php - mime type configured
> application/x-httpd-php.
>
> The apache config contains
> AddType application/x-httpd-php .php .php4 .php3 .phtml
> AddType application/x-httpd-php-source .phps
> Include conf/confixx_vhost.conf
>
> The confixx_vhost.conf contains lots of virtual host configured on a named
> vhost basis.
>
> php is minimally configured with
> './configure' '--with-mysql' '--with-apxs'
>
> Linux version Linux 2.4.20.
>
> Thanks for any hint
> Stephan
>
> --------------------------------------------------------------------------
> Gloor Informatik Zurlindenstr. 215 a 8003 Zürich
> Tel: 01 461 24 11 Fax: 01
> 461 22 39 info@gli.ch
Is the server in a load balanced envirionment? The first thing that
came to my mind was that it is load balanced and one of the servers are
misconfigured.

-Calico Jack-