How does PHP output HTML code, and what implications does this have for displaying PHP code externally?

PHP outputs HTML code by embedding it within PHP tags (<?php ?>) within the PHP file. This means that when a PHP file is accessed by a browser, only the output HTML code is displayed, while the PHP code itself is processed on the server-side. To display PHP code externally, you can use a code editor or browser developer tools to view the source code of the webpage.

&lt;?php
// PHP code to output HTML code
echo &quot;&lt;html&gt;
&lt;head&gt;
&lt;title&gt;PHP Output&lt;/title&gt;
&lt;/head&gt;
&lt;body&gt;
&lt;h1&gt;Hello, World!&lt;/h1&gt;
&lt;/body&gt;
&lt;/html&gt;&quot;;
?&gt;