I am new to PHP. I know a little JavaScript, HTML, MySQL and lots of non-web computer programming.
I know how to create an HTML page with a form, use a button to call an external PHP file (with $_POST) which sends an email and records that forms data (names and email addresses) into a MySQL database.
Now, I'd like to create a new HTML page that calls an external PHP file (so the code is hidden) that will return the MySQL data (names and email addresses) for display on that existing HTML page (with all its CSS formatting and menus). In otherwise, I'd like to modify an existing HTML page with data (but hide the PHP code in an external file).
If this can be done (I'm new to this), can some please help by giving me at least the general idea so that I can build upon it. The textbooks that I've flipped through simply explain how to "echo" data back to the screen (a blank screen) with a .php extension in the address bar.
Thank you very much for your time and any help. I appreciate it!