如何通过 ssh 在 PHP 中执行远程命令？
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How can I execute remote commands in PHP via ssh?
提问by kamal
I am trying to execute remote commands from within a php script over ssh, and I want the output from the commands (stdout and stderr) be streamed to the originating host.
我正在尝试通过 ssh 从 php 脚本中执行远程命令，并且我希望命令（stdout 和 stderr）的输出流式传输到原始主机。
I know in Perl and Ruby this is possible. I could not find any such examples in php.
我知道在 Perl 和 Ruby 中这是可能的。我在 php 中找不到任何这样的例子。
Code:
代码：
$ip = 'kssotest.yakabod.net';
$user = 'tester';
$pass = 'kmoon77';
$connection = ssh2_connect($ip);
ssh2_auth_password($connection,$user,$pass);
$shell = ssh2_shell($connection,"bash");
$cmd = "echo '[start]';your commands here;echo '[end]'";
$output = user_exec($shell,$cmd);
fclose($shell);
function user_exec($shell,$cmd) {
fwrite($shell,$cmd . "\n");
$output = "";
$start = false;
$start_time = time();
$max_time = 2; //time in seconds
while(((time()-$start_time) < $max_time)) {
$line = fgets($shell);
if(!strstr($line,$cmd)) {
if(preg_match('/\[start\]/',$line)) {
$start = true;
}elseif(preg_match('/\[end\]/',$line)) {
return $output;
}elseif($start){
$output[] = $line;
}
}
}
}
But when I execute it like this $php remote.php, I get an error:
但是当我像这样执行它时$php remote.php，我收到一个错误：
PHP Fatal error: Call to undefined function ssh2_connect()
in /home/tester/PHP_SSH2/remote.php on line 6
What is the best way to execute remote commands in PHP via ssh?
通过 ssh 在 PHP 中执行远程命令的最佳方法是什么？
采纳答案by Parris Varney
If you can't add php packages due to red tape, here's a simple class that can do the trick
如果由于繁文缛节而无法添加 php 包，这里有一个简单的类可以解决问题
class ExecuteRemote
{
private static $host;
private static $username;
private static $password;
private static $error;
private static $output;
public static function setup($host, $username=NULL, $password=NULL)
{
self::$host = $host;
self::$username = $username;
self::$password = $password;
}
public static function executeScriptSSH($script)
{
// Setup connection string
$connectionString = self::$host;
$connectionString = (empty(self::$username) ? $connectionString : self::$username.'@'.$connectionString);
// Execute script
$cmd = "ssh $connectionString $script 2>&1";
self::$output['command'] = $cmd;
exec($cmd, self::$output, self::$error);
if (self::$error) {
throw new Exception ("\nError sshing: ".print_r(self::$output, true));
}
return self::$output;
}
}
回答by Jim W.
Did you install the SSH2 package?
您是否安装了 SSH2 软件包？
回答by calgaryhit
Installing the PECL SSH2 package is a PITA. Try phpseclib, a pure PHP SSH implementationinstead. Take a look at this post to see why the PECL SSH2 extension should be avoided at all costs:
安装 PECL SSH2 包是一个 PITA。试试phpseclib，一个纯 PHP SSH 实现。看看这篇文章，看看为什么应该不惜一切代价避免使用 PECL SSH2 扩展：
回答by kamal
at least on ubuntu: the following instructions work: http://kevin.vanzonneveld.net/techblog/article/make_ssh_connections_with_php/ make_ssh_connections_with_php
至少在 ubuntu 上：以下说明有效：http: //kevin.vanzonneveld.net/techblog/article/make_ssh_connections_with_php/make_ssh_connections_with_php
回答by Fedir RYKHTIK
With authentification managed by SSH keys it's quite simple :
通过 SSH 密钥管理的身份验证非常简单：
$cmd = 'ssh user@host script ' . $arguments . ' 2>/dev/null';
$result = shell_exec($cmd);
PHP 5.5
PHP 5.5
