Re: PHP and a general problem understanding fastcgi

On Tue, 12 Jul 2005, Benjamin Podszun wrote:

> Thanks for sharing that experience..
>
>> Here's a sample vhost configuration for you:
>> 
>>  User blah
>>  Group blahgrp
>>  FastCgiServer /export/httpd/DOMAINS/blah.com/cgi-bin/php -port 9050
>>  AddHandler php-fastcgi .php
>>  <Location /cgi-bin/php>
>>    SetHandler fastcgi-script
>>  </Location>
>>  Action php-fastcgi /cgi-bin/php
>> 
>> That creates the necessary hookup for .php files, and runs PHP stuff via 
>> suexec as blah/blahgrp.  You then have this file:
>> 
>>  #!/bin/sh
>>  PHPRC="/usr/local/etc/php/php-blah"
>>  export PHPRC
>> 
>>  PHP_FCGI_CHILDREN=4
>>  export PHP_FCGI_CHILDREN
>>  exec /opt/php/4.3.4/bin/php
>> 
>> which controls that particular instance.
>
> Nice example and helps quite a lot, thanks. But some questions remain:
> - What is the port for? Who connects to that port?

The port is if you want to have FastCgiExternalServer directives - which allows 
you to have other vhost httpd's connect to a single PHP instance.  For example, 
I actually have five domains for this particular user.  One of them has this:

   FastCgiServer /export/httpd/DOMAINS/blah.com/cgi-bin/php -port 9050

And the other four have this:

   FastCgiExternalServer /export/httpd/DOMAINS/blah1.com/cgi-bin/php -host localhost:9050
   FastCgiExternalServer /export/httpd/DOMAINS/blah2.com/cgi-bin/php -host localhost:9050
   FastCgiExternalServer /export/httpd/DOMAINS/blah3.com/cgi-bin/php -host localhost:9050
   FastCgiExternalServer /export/httpd/DOMAINS/blah4.com/cgi-bin/php -host localhost:9050

So rather than have another four instances, one does all of the work.

> - How is the FastCgiServer connected to the AddHandler? I mean: Couldn't you 
> define multiple servers? How do you distinguish which server you want to use 
> for .php files? To clarify my question:
>
> FastCgiServer /export/httpd/DOMAINS/blah.com/cgi-bin/php -port 9050
> FastCgiServer /export/httpd/DOMAINS/blah2.com/cgi-bin/php -port 9051
> AddHandler php-fastcgi .php
>
> Is the above possible? How can I connect a specific server to a filetype?

Ah...it's done in the context of the vhost.  So, you can only have one PHP 
FastCgi handler per suffix per vhost.

> - What happens if the php handler die? Do I deliver source in that case, as 
> apache defaults to without mod_php?

The handler is restarted by FastCGI automatically if it is killed or crashes.

David.

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