Detailed explanation of how PHP uses ssh2 technology to achieve remote login and operate programs on the server

<?php
$host=&#39;*******&#39;;//服务器的ip
$user=&#39;****&#39;;//用户名
$passwd=&#39;******&#39;;//密码
// 链接远程服务器
$connection = ssh2_connect($host, 22);
if (!$connection) die(&#39;connection to &#39;.$host.&#39;:22 failed&#39;);
echo &#39;connection OK<br/>&#39;;
// 获取验证方式并打印
$auth_methods = ssh2_auth_none($connection, $user);
print_r( $auth_methods.&#39;<br/>&#39;);
if (in_array(&#39;password&#39;, $auth_methods ))
{
// 通过password方式登录远程服务器
if (ssh2_auth_password($connection, $user, $passwd))
{
echo $user.&#39; login OK<br/>&#39;;
$stream = ssh2_exec($connection, "命令1&&命令2"); // 一条一条地执行linux命令
stream_set_blocking($stream, true); // 获取执行pwd后的内容
if ($stream === FALSE) die("pwd failed");
echo stream_get_contents($stream).&#39;<br/>&#39;;
}
else
{
die( $user.&#39; login Failed<br/>&#39;);
}
}
?>