Hi Iam creating a php interface to access and administrate linux from a windows box....

The question is that I need to connect to the linux box with ssh to administrate it right ??? ... and for that purpose I use PuTTy, now if I need to create an ssh connection through a php interface what command should I use >???

The only way I can think of is using something like shell_exec(" "); whereby you would grab the username + password provided in a basic web form, store them as variables, then execute the command and return the results to screen. A simple text box allows you enter your commands, then shell_exec returns the output. I don't know if it's a very efficient way of doing it though and I think you only have the last line returned to screen, so am not sure how it would handle directory listings or displaying a list of running processes, etc.

But shouldn't I create a ssh connection btw the win client and the linux server ??? The way you are stating it I can just execute any command on the linux box as long as I got a username and pwd with enough priveliges did i get that right ?? I mean how should I provide the address of the remote host???

Maybe you could check Plink. It should be the command-line interface of PuTTY. (never tryed it myself)