In a webpage browser, what syntax will I use to automatically open or display a php

[edwinbiasbas]

file using the index.html? I programmed a php file but I need to be be opened or to be displayed automatically without copying the content of the php to the index.html....

What syntax will I insert to the index.html because most index.html upn opening a browser to that directory it automatically read the index.html not the desired file.php.