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Asked: 2026-06-15T05:10:05+00:00

I am using AJAX in my dynamic website. Instead of reloading a whole page,

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I am using AJAX in my dynamic website. Instead of reloading a whole page, I used AJAX to request PHP file, and change the content of the page.

Is it OK to take away doctype and tags from those PHP files that requested by AJAX?
Will I get any errors in future, if I leave doctype and tags from PHP…

Thank.

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1 Answer

  1. Editorial Team

    Scenario 1

    If the “page” is actually a fragment that is being inserted dynamically into a complete document, you don’t need those tags (in fact, they would be invalid).

    <!DOCTYPE html>
<head></head>
<body>

    <div></div>
    <!-- fine to insert a fragment here -->
</body>
</html>

    Scenario 2

    If the page needs to stand alone, it must be complete and valid. Even if it displays correctly, it has the potential for major issues.

    Scenario 3

    If the PHP page is just serving data (e.g. JSON) in response to an AJAX request, it doesn’t need any HTML markup at all (@Sean Dunwoody demonstrates this).

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