How do you Parse PHP with HTML file extensions?

You write the file as a .php file - most web servers can't be forced to parse and run PHP from an .htm file. In that file, close the PHP part with ?> then add your HTML code, or use echo statements in PHP to echo the HTML to the client. Example: <?php #this is an example of PHP code $variable = 5 + $other_variable; ?> <! HTML code starts here > Or: <?php #this is an example of PHP code $variable = 5 + $other_variable; echo 'This is going to show up on the screen, because it\'s text as far as HTML is concerned.' echo '<br />'; echo 'This is another line.'; ?> You can include Javascript in echo statements, since they're just sent to the browser as-is.  If you want to include data from the server, you can echo an HTML line with server data included in it, or jump out of PHP (?>), out in the HTML, jump back and put in the variable (that's how WpordPress does things, and it's not really good practice). But getting the server to parse php that's in a file with an .htm or .html extension?  Don't do that. (Change an htm file to have a php extension and it'll still work.  The server will just output the html text until it encounters the initial <?php - which it never will, and it won't care.)