//connect to server
$resConnection = ssh2_connect($strServer, $strServerPort);
if(ssh2_auth_password($resConnection, $strServerUsername, $strServerPassword)){
    //Initialize SFTP subsystem
    //echo "connected";
    $resSFTP = ssh2_sftp($resConnection);    
	$mytext = "kazkas"; 
file_put_contents("ssh2.sftp://{$resSFTP}/var/www/failas.txt", PHP_EOL . $mytext, FILE_APPEND);

$file = 'test.txt';
$message = 'kzkas';
file_put_contents($file, PHP_EOL . $message, FILE_APPEND);