All Is Fine

PHP is a server side scripting language, as this programming language interpreted at runtime
PHP is used for creating HTML pages, dynamically
PHP scripts can only be interpreted on a server that has PHP installed
PHP script can be run using Web Browser / CLI (command line interface)
PHP file should have .php extension
PHP is very easy to learn as
- It has many functions and libraries with matching name to English words
- It doesn't restrict programmer harshly, on common errors
PHP code is written in its tags-
- Opening tag is <?php
- Closing tag is ?>
If PHP tags are embedded into HTML code, it will require webserver to run this page
Example code- <?php echo "Hello World!"; ?>