title: SSH Connection and command in PHP
body: <p>I have some project to do but killing myself and cannot do anything, i need you help .
  I am have to make PHP Command to use SSH Connection. 
  I am using Putty , entering IP and Port, than browsing .PPK file ( key authentication file ) and Entering Username And Password, after using command Reboot . so server is rebooting. </p>
  
  <p>Now i want to make all of this simply using PHP  , i want to make a textbox and submit button , when entering IP address in textbox and clicking submit button it should make all this reboot command in background. (port is default 22). I will make this textboxes and buttons but cannot get how to make this connection with command and key authentication.
  if somebody know this please help me solving this problem. i cannot take it any more. </p>