ssh2_auth_pubkey_file Authenticate using a public key boolssh2_auth_pubkey_file resourcesession stringusername stringpubkeyfile stringprivkeyfile stringpassphrase Authenticate using a public key read from a file. If privkeyfile is encrypted (which it should be), the passphrase must be provided. 'ssh-rsa')); if (ssh2_auth_pubkey_file($connection, 'username', '/home/username/.ssh/id_rsa.pub', '/home/username/.ssh/id_rsa', 'secret')) { echo "Public Key Authentication Successful\n"; } else { die('Public Key Authentication Failed'); } ?> ]]>