Are there specific guidelines for integrating PHP code within HTML documents to ensure proper functionality in Apache servers?

When integrating PHP code within HTML documents to ensure proper functionality in Apache servers, it is important to enclose PHP code within `<?php ?>` tags. This ensures that the server recognizes and processes the PHP code correctly. Additionally, it is crucial to save the file with a `.php` extension to inform the server that it contains PHP 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 to &lt;?php echo &quot;PHP&quot;; ?&gt;&lt;/h1&gt;
&lt;/body&gt;
&lt;/html&gt;

Keywords

PHP HTML integration Apache servers functionality

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