Well, I have two ideas, one is probably more likely to work (and more attractive) than the other.
PHP has a function to send data to a socket that's connected, called socket_send (
http://nl3.php.net/manual/en/function.socket-send.php). I think you would have to use socket_accept to connect with the open Octave socket (or you could use socket_sendto, which is a brute-force method that sends data to a socket whether it's connected or not), and then socket_send could be used to make PHP communicate with Octave.
There's also a socket_listen (
http://nl3.php.net/manual/en/function.socket-listen.php), so first you create your socket, then you bind it to a name, then you start listening on it. This would probably be the way to go with Octave returning results to PHP.
The PHP documentation has got some great examples and it's well-written, so that should definitely help you out a lot.
The second idea...
> Also I would like to
> have the Ocatve code running all the time, or at least have access
> to large amount of data in the internal memory without having to
> make a slow load from the harddrive between the calls. Also there
> may be several user access this information at the same time.
I'm not sure exactly what you mean by this, and this suggestion may not satisfy your needs, but you could try using files as an intermediary (i.e. PHP writes input to file, calls octave using a program execution function (more info here
http://nl3.php.net/manual/en/ref.exec.php), octave writes the output to another file, and php reads & displays it to the user). This would definitely be slower, but if you need to get something working quick, but you need more time to figure out the socket-to-socket stuff, this may be a good intermediate solution.
This has captured my interest, I will be playing around with this more to see if I can get it working. Please let us know how this goes for you.
Charles
On Thu, Sep 4, 2008 at 10:00 PM, Sverker Sikström
<address@hidden> wrote:
Hi Charles
Thanks a lot! The demo worked fine and it is easy to see how the calls must be made and what needs to be initalized. If you happen to know how to send thing from PhP then lets us know. Otherwise thanks a lot for the help!
Sverker
charles reid skrev:
The original author of the sockets package put together a test program, which can be found here (
http://article.gmane.org/gmane.comp.gnu.octave.sources/60) and is included below. Also, you might try 'man listen' from a Unix command line, since it's the Unix listen that the sockets package is calling.
## Tests for octave sockets
##
function test_octave_socket()
page_screen_output = 0
load_socket_constants
fail = 0
# Create the sockets
## Server socket
server = socket(AF_INET, SOCK_STREAM, 0)
if( server < 0 )
++fail
return
end
rc = bind(server,9001)
if( rc ~= 0 )
++fail
return
end
rc = listen(server,1)
if( rc ~= 0 )
++fail
return
end
## Client socket
client = socket(AF_INET, SOCK_STREAM, 0)
if( client < 0 )
++fail
return
end
# Create the connection and accept the connection
rc = connect(client, server_info)
if( rc ~= 0 )
++fail
return
end
server_data = accept(server)
if( server_data < 0 )
++fail
return
end
# Send and receive data
## Send as string from client
msg = "Hello socket-land!"
rc = send( client, msg )
if( rc ~= length(msg) )
++fail
return
end
## Receive at server
[msg_s, len_s] = recv( server_data, 100 )
if( msg_s == -1 || len_s ~= length(msg) )
++fail
return
end
## Send back out from server
rc = send( server_data, msg_s )
if( rc ~= length(msg_s) )
++fail
return
end
## Receive at client
[msg_c, len_c] = recv( client, 100 )
if( msg_c == -1 || len_c ~= length(msg) )
++fail
return
end
## Compare original string with recv string
msg_in = num2str( msg_c, '%c' )
if( msg_in ~= msg )
++fail
return
end
rc = disconnect( client )
rc = disconnect( server_data )
rc = disconnect( server )
printf( 'Number of failures: %d\n', fail )
end
Hope this helps.
Charles
Don't you want listen('127.0.0.1 <http://127.0.0.1>','fork')?
<mailto:
address@hidden>> wrote:
On Sep 4, 2008, at 8:29 AM, Sverker Sikström
<address@hidden
e> wrote:
> Dear Ben
>
> Thanks a lot for you very helpfull instruction of how to get
going
> with the Listen command a few weeks back. I did get command
> "started" using your help, however, I have not been able get it
> going yet. I would very much appreciate a helping hand here.
>
> My goal is to have Php programm communciating with Octave,
so that
> one can that when a visotor click on a webpage than this
webpage can
> send string to Octave that makes a calcualtion and send its
back to
> the webpage (where we use Php) at the webpage. Also I would
like to
> have the Ocatve code running all the time, or at least have
access
> to large amount of data in the internal memory without having to
> make a slow load from the harddrive between the calls. Also
there
> may be several user access this information at the same time.
>
> I am not sure how to do this. But I think the Listen command
would
> be the way to go. Is that correct?
>
> I try to run listen with:
>
> octave-3.0.1:1> pkg load sockets
> error: connect: expecting a octave_socket or integer
> octave-3.0.1:2>
>
> But I get an error message (see above). I guess I have the wrong
> call, or perhapse I need to initaitve something before.
>
> Once this code in the Octave is up and running. Then how do
you call
> this rotine from Php?
>
> I would appreciate help on this topic very much. If you do
not know
> how to set this up, please suggest someone that could help
us out on
> this.
>
> Sincerely, Sverker Sikström
>
> Ben Abbott skrev:
>>
>> On Aug 11, 2008, at 5:05 AM, Sverker Sikström wrote:
>>
>>> Hi
>>>
>>> This is probabaly a very simple questions, but I am stuck
and new to
>>> Octave. I am trying to run the command 'listen'
>>> (
http://octave.sourceforge.net/doc/f/listen.html) on
Octave. But
>>> it does
>>> not seem to find the command:
>>>
>>> octave-3.0.1:46> listen
>>> error: `listen' undefined near line 46 column 1
>>> octave-3.0.1:46>
>>>
>>> Have I not installed Octave correctly? I am using mac 0s
10.5. 4.
>>> Any
>>> help is appreciated!
>>>
>>> Sverker
>>
>> I haven't tried to do this under Mac OS X, but you'll need to
>> install the sockets package from Octave-Forge. The "listen"
command
>> is part of that package (it is not part of Octave's core
functions).
>>
>>
http://octave.sourceforge.net/sockets/index.html
>>
>> To install see "help pkg"
>>
>> Ben
Unfortunately, I'm not knowledgeable in what you'd like to do
..., so
I've cc'd Octave's help list. Hopefully someone will be able
to answer
your questions.
Ben
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