[英]How can I execute remote commands in PHP via ssh?
我試圖通過ssh在php腳本中執行遠程命令,我希望將命令(stdout和stderr)的輸出流式傳輸到原始主機。
我知道在Perl和Ruby中這是可能的。 我在php中找不到任何這樣的例子。
碼:
$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[] = $line;
}
}
}
}
但是當我像這個$php remote.php
一樣執行它時,我收到一個錯誤:
PHP Fatal error: Call to undefined function ssh2_connect()
in /home/tester/PHP_SSH2/remote.php on line 6
通過ssh在PHP中執行遠程命令的最佳方法是什么?
如果由於繁文縟節而無法添加php包,這里有一個簡單的類可以解決問題
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;
}
}
安裝PECL SSH2軟件包是PITA。 試試phpseclib,一個純PHP SSH實現 。 看一下這篇文章,看看為什么要不惜一切代價避免PECL SSH2擴展:
通過SSH密鑰管理身份驗證非常簡單:
$cmd = 'ssh user@host script ' . $arguments . ' 2>/dev/null';
$result = shell_exec($cmd);
PHP 5.5
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