PHP 5.3 on CentOS does not work.

Question

On a CentOS, PHP 5.3 is installed, but does not work, do you have to somehow start something?

Apache is started and Apache 2 Test Page is displayed alright. I added a testphp.php file with the following and browsing to the file just shows the source:

<?php
phpinfo();
?>

Answer 1

Restarted apache and now it works.