What are the potential pitfalls of automatically answering the "Host key not cached" error in a PHP script?

When encountering the "Host key not cached" error in a PHP script, it typically means that the SSH host key for the server is not cached in the known_hosts file. One way to solve this is to manually add the host key to the known_hosts file. However, automatically answering "yes" to the prompt can pose security risks as it bypasses the verification process, potentially exposing the script to man-in-the-middle attacks.

// Example of automatically answering "yes" to the "Host key not cached" error (not recommended)
$connection = ssh2_connect('example.com', 22);
ssh2_auth_password($connection, 'username', 'password');