log4php programmatically runtime setfile in appender LoggerAppenderFile

I don't PHP very often but lately I needed a robust log. I used a lot log4j so immediately turn to log4php The documentation is still very poor with very little examples on the net. In particular, I needed to set some options at runtime or programmatically, especially the filename for the LoggerAppenderFile, so here is a little minimalistic example on how to do it:

  require_once('log4php/Logger.php');

  $rootlogger = Logger::getRootLogger();
  $rootlogger->setLevel(LoggerLevel::DEBUG);

  $appender = new LoggerAppenderFile("MyAppender");
  $appender->setFile("mylogfile.log", true);
  $appenderlayout = new LoggerLayoutTTCC();
  $appender->setLayout($appenderlayout);
  $appender->activateOptions();

  $rootlogger->removeAllAppenders();
  $rootlogger->addAppender($appender);

  $rootlogger->info("info");
  $rootlogger->error("error");
  $rootlogger->debug("debug");

if you don't use the rootlogger you don't need to removeAllAppenders in order to get rid of the console one.