Telet resource in session var

byp

Hi,

its possible in php5 to save a telnet resource in a session variable?. i know that in php 4 its not possible.

If its not possible, can anyone show me a solution to implemente a soft in PHP that connects to a telnet server, and execute commands there? i need to manage lots of pages with that connection alive, for perhaps some hours.

thks

bernard

bpat1434

You could use [man]fsockopen/man or [man]socket_create/man to create a socket to a server.

You could try to store the socket in the session, but I'm willing to bet it won't save state (meaning you'd have to reconnect and such). I haven't tried it, but you could try and see what happens. Nothing wrong with some trial and error.

byp

ok thanks, i've tried to do it with fopen and it works but im asking a way to store the resource and not being reconecting every command.

bpat1434

I don't think you can store it in the session or anywhere and keep it across page requests. Try it and see. I've never tried it since I don't particularly use fopen all that often (especially not to telnet into something). I have no use for it, so I don't use it often; however, I do know you can store resources (like mySQL results, objects, etc.), but I'm not sure about open streams.

Weedpacket

It wouldn't work: holding a resource like that across requests would require the cooperation of both parties (you and the Telnet server) there is no protocol that could be used to tell the other party to "keep this connection open: I might be coming back to use it some more later".

byp

perhaps..... but sience php give us sessions to work, maybe it`s possible. reeding a bit more i found that the apache server open an instance of php everey request, and then close it. in that context its comprensible

thanks anyway i ll use java instead.

NogDog

As stated in http://php.net/manual/en/intro.session.php:

Warning

Some types of data can not be serialized thus stored in sessions. It includes resource variables or objects with circular references (i.e. objects which passes a reference to itself to another object).

byp

yes i know, my thread was posted to ask other if there is other way to store resources throw sessions.

thanks everybody

Weedpacket

Um...
"That can't be done."
"Yes, I know, but can it be done?"

A resource isn't something that can be written down - it can't be converted into a string. And because it can't be converted into a string, it can't be stored in the session data.

A resource that contains a Telnet connection can't be written down because some of it is on the other server. If you could get the other server to store everything relevant it has to the connection, and if you could get both it and your machine to record a common token so that when (if) your machine wants to continue the connection both computers can recover all their state, then you might be on to something.

Another possibility is if you had an entirely separate program on your computer continually running and keeping the Telnet connection open. Then your script would talk to this program and this program would talk to the Telnet server.

byp

OK, thank you for all the explanations. I'll try to develop a low level daemon to manage the connection.

by by,

Bernardo.