How can PHP developers optimize their code for executing multiple SSH commands sequentially and ensuring the continuity of the connection between commands?

PHP developers can optimize their code for executing multiple SSH commands sequentially by using a single SSH connection for all commands. This can be achieved by keeping the SSH connection open between commands and sending the commands one after the other without reconnecting each time. This approach helps in improving performance and reducing overhead associated with establishing multiple SSH connections.

// Establish SSH connection
$connection = ssh2_connect('example.com', 22);
ssh2_auth_password($connection, 'username', 'password');

// Execute multiple commands sequentially
$stream = ssh2_exec($connection, 'command1');
stream_set_blocking($stream, true);
$output1 = stream_get_contents($stream);

$stream = ssh2_exec($connection, 'command2');
stream_set_blocking($stream, true);
$output2 = stream_get_contents($stream);

// Close SSH connection
ssh2_disconnect($connection);