I just installed MAMP 2.1.1 on OS X 10.7.4. The MAMP Start page says everything is running.

MySQL is running, I can issue command line commands in Terminal. I tested PHP by typing:

php -f testphp.php

where testphp.php contained one line of code:

echo phpinfo(); ?>

In the terminal window, this returned the expected - an extensive listing of PHP config info. All appears to be well, but if I direct Safari to a simple PHP page, instead of seeing the page run, I get a listing of its source code!

I built a page whose body is:

Testing PHP:
echo phpinfo(); ?>

I called it testphp.php. If I go to :

localhost/testphp.php

I see the source code listing! If I rename the file to testphp.html, I see:

Testing PHP:

but that's all - the line of PHP code produces nothing.

Can anyone explain why my localhost server won't talk PHP?