24.4.3 Summary of PHP Syntax
If there is a static HTML tag on a web page, that page will always show the same content. However, if you use PHP to change the content of these HTML pages, the page will show the new changed contents. Like this, PHP plays a role to change the contents of a static HTML page into dynamic page. Therefore, according to the situation requested within the static HTML, a new HMTL is created and integrated with the existing static HTML tag to become an HTML document constituting a complete page.