How can PHP and HTML be integrated effectively to avoid compatibility issues?

When integrating PHP and HTML, it is important to properly separate PHP code from HTML markup to avoid compatibility issues. One effective way to do this is by using PHP to generate dynamic content within HTML templates. This can be achieved by embedding PHP code within HTML files using the `<?php ?>` tags to execute PHP code and generate dynamic content seamlessly within the HTML structure.

&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;PHP and HTML Integration&lt;/title&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;h1&gt;Welcome &lt;?php echo &quot;User&quot;; ?&gt;&lt;/h1&gt;
    &lt;p&gt;This is a dynamic content generated using PHP within HTML.&lt;/p&gt;
&lt;/body&gt;
&lt;/html&gt;