PHP:
<?php - this code starts the PHP script
echo "hi there"; - this code says on the page hi there, you can also add variables and you can also use html code in an echo.
?> - this code ends the PHP script.
<?php - this code starts the PHP script
echo "hi there"; - this code says on the page hi there, you can also add variables and you can also use html code in an echo.
?> - this code ends the PHP script.