What are the common challenges faced by beginners when trying to integrate PHP into HTML?

Beginners often struggle with syntax errors when trying to integrate PHP into HTML. To solve this, it's important to ensure that PHP code is enclosed within <?php ?> tags and that the file has a .php extension. Another common challenge is understanding how to pass data between PHP and HTML, which can be achieved using echo or print statements to output PHP variables within HTML code.

&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;PHP Integration&lt;/title&gt;
&lt;/head&gt;
&lt;body&gt;
    &lt;h1&gt;Welcome &lt;?php echo &quot;John Doe&quot;; ?&gt;&lt;/h1&gt;
    &lt;p&gt;&lt;?php $age = 25; echo &quot;Age: &quot; . $age; ?&gt;&lt;/p&gt;
&lt;/body&gt;
&lt;/html&gt;