php help Options

[Maccabee]

If I make a file that says yada yada yada yada yada yada yada yada and save it as header.php and then make a file that says <?php include("header.php"); ?> and save it as site.html when I open site.php in my browser shouldnt it say yada yada yada yada yada yada yada yada?

Ok well that is a question I asked on yahoo answers and it worked but I have one more question?

Once I did the the file mysite.php was only a text document?

Is it supposed to be like that or what?

Is their soemthing I need to download to be able to view the file properly?

Thanks