配置PHP脚本以从远程ssh服务器阵列回显数据

您好，我想知道是否有可能通过服务器阵列从多个服务器获得对PHP的响应

我试图创建一个脚本，将grep文本在多个服务器上，每台服务器有不同的文件，但我有一个列表中的所有文件的目录中的每台服务器存储到一个list.txt。我正在努力使搜索尽可能快，我目前正在使用ripgrep对我的数据进行格雷普

<?php
if (!function_exists('ssh2_connect'))
{
    die("Install ssh2 module.\n");
}
if (isset($_GET['command'], $_GET['text'], $_GET['down'])) {
    $SERVERS = array(
            "10.0.0.3"       =>      array("root", "password")
            "10.0.0.4"       =>      array("root", "password")
            "10.0.0.5"       =>      array("root", "password")
            "10.0.0.6"       =>      array("root", "password")
            );
    class ssh2 {
            var $connection;
            function __construct($host, $user, $pass) {
                    if (!$this->connection = ssh2_connect($host, 22))
                            throw new Exception("Error connecting to server");
                    if (!ssh2_auth_password($this->connection, $user, $pass))
                            throw new Exception("Error with login credentials");
            }

            function exec($cmd) {
                    if (!ssh2_exec($this->connection, $cmd))
                            throw new Exception("Error executing command: $cmd");

                    ssh2_exec($this->connection, 'exit');
                    unset($this->connection);
            }
    }
    if($_GET['command'] == "Download") { $command = "wget http://10.0.0.7/data/{$down}.db"; }
    elseif($_GET['command'] == "Search") { $command = "while read filename; do grep {$text} "$filename"; done < list.txt" }
    else die();
    foreach ($SERVERS as $server=>$credentials) {
            $disposable = new ssh2($server, $credentials[0], $credentials[1]);
            $disposable->exec($command);
            echo "<pre>$disposable</pre>";
}
}
?>

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您在这里面临的问题是什么？在echo“$disposable”行中；它不会从服务器回显数据，我不知道如何使其正常工作。