php 透過ssh遠端操作其他server

使用php進行ssh連線至遠端linux執行指令 (只要是開放ssh連線的server，皆可以用此模式下指令)

• centos 6 安裝SSH2 extension for PHP
  http://programster.blogspot.tw/2013/06/centos-64-install-ssh2-extension-for-php.html

• 參考以下網址，複製其PHP SSH CONNECT，存成ssh2.php

http://nsysumis94.pixnet.net/blog/post/17328247-%E5%A6%82%E4%BD%95%E7%94%A8php%E5%81%9Assh%E9%80%A3%E7%B7%9A

• 使用ssh2 class套件 進行遠端下指令
  

  <?php
  
  include_once("ssh2.php");
  $shell = new ssh2("172.31.0.1"); //連線ip
  $shell->authPassword("admin","1234"); //帳密
  
  $shell->openShell("xterm"); //開啟一個Terminal
  //開始下指令
  $shell->writeShell("cd /");
  $shell->writeShell("ls");
  
  $shell->writeShell("exit"); //關閉此Terminal
  
  $result=$shell->getResult(); //將下指令的過程與結果(Terminal畫面存進$result)
  printr($result);
  
  ?>

•  ssh2.php  (ssh2 class)
  
  <?php
  
  // ssh protocols
  // note: once openShell method is used, cmdExec does not work
  
  class ssh2 {
  
    private $host = 'host';
    private $user = 'user';
    private $port = '22';
    private $password = 'password';
    private $con = null;
    private $shell_type = 'xterm';
    private $shell = null;
    private $log = '';
  
    function __construct($host='', $port=''  ) {
  
       if( $host!='' ) $this->host  = $host;
       if( $port!='' ) $this->port  = $port;
  
       $this->con  = ssh2_connect($this->host, $this->port);
       if( !$this->con ) {
         $this->log .= "Connection failed !";
       }
  
    }
  
    function authPassword( $user = '', $password = '' ) {
  
       if( $user!='' ) $this->user  = $user;
       if( $password!='' ) $this->password  = $password;
  
       if( !ssh2_auth_password( $this->con, $this->user, $this->password ) ) {
         $this->log .= "Authorization failed !";
       }
  
    }
  
    function openShell( $shell_type = '' ) {
      
      if ( $shell_type != '' ) $this->shell_type = $shell_type;
      $this->shell = ssh2_shell( $this->con,  $this->shell_type );
      if( !$this->shell ) $this->log .= " Shell connection failed !";
      stream_set_blocking( $this->shell, true );
    
    }
  
    function writeShell( $command = '' ) {
  
      fwrite($this->shell, $command."\n");
        
    }
  
    function cmdExec( ) {
  
          $argc = func_num_args();
          $argv = func_get_args();
  
      $cmd = '';
      for( $i=0; $i<$argc ; $i++) {
          if( $i != ($argc-1) ) {
            $cmd .= $argv[$i]." && ";
          }else{
            $cmd .= $argv[$i];
          }
      }
      echo $cmd;
  
      $stream = ssh2_exec( $this->con, $cmd );
      stream_set_blocking( $stream, true );
         return stream_get_contents($stream);
  
    }
  
    function getLog() {
       return $this->log;
  
    }
  
      function getResult(){
          $contents='';
      while (!feof($this->shell)) {
          $contents.=fgets($this->shell);
      }
      return $contents;
      }
  }
  
  ?>