PHP Headers and Popular Mime Types

By  on  

Like my Create a Basic Web Service Using PHP, MySQL, XML, and JSON illustrates, even though a file's extension ends in PHP, you can still tell the browser that you're outputting a different content type. Here are a few of the more popular content types used on the internet.


header('Content-Type: application/atom+xml');


header('Content-Type: text/css');


header('Content-Type: text/javascript');

JPEG Image

header('Content-Type: image/jpeg');


header('Content-Type: application/json');


header('Content-Type: application/pdf');


header('Content-Type: application/rss+xml; charset=ISO-8859-1');

Text (Plain)

header('Content-Type: text/plain');


header('Content-Type: text/xml');

Just because a file ends in .PHP doesn't mean it responds with XHTML -- respond however you'd like!

Track.js Error Reporting

Upcoming Events

Recent Features

  • How I Stopped WordPress Comment Spam

    I love almost every part of being a tech blogger:  learning, preaching, bantering, researching.  The one part about blogging that I absolutely loathe:  dealing with SPAM comments.  For the past two years, my blog has registered 8,000+ SPAM comments per day.  PER DAY.  Bloating my database...

  • Facebook Open Graph META Tags

    It's no secret that Facebook has become a major traffic driver for all types of websites.  Nowadays even large corporations steer consumers toward their Facebook pages instead of the corporate websites directly.  And of course there are Facebook "Like" and "Recommend" widgets on every website.  One...

Incredible Demos


  1. Great list of mime types.
    Perhaps I’d just be careful about the charset at the RSS example. People could add it blindly and suddenly accented characters would stop working if the rest of the site is using other encodings, like utf-8.

  2. Interesting list. Nothing new, but still nice. BTW Javascript and XML should be application, text is obsolete.

  3. @Matěj Grabovský: Interesting. Can you share your resource for knowing that?

  4. @David Walsh: Well, especially Wikipedia, RFCs (concretely RFC3023) and this thing.

  5. Thank you for sharing Matěj!

  6. You’re welcome, sir!

  7. BTW, It is common to prefix experimental mime types with ‘x-‘ (e.g. application/x-json)

  8. Very usefull stuff, I suggest you ad this one too (exe, zip, rar…)

    header("Content-Type: application/force-download");

    BTW, 7 comments, since may 7th… and it’s 7 a.m. here in Morocco

  9. Thanks a lot for this information.

  10. Content-Type or Content-type ?

  11. Have been using just the java, css and htmls. Will do with the rest later.
    Thanks for the list David.
    Pleasure reading.

  12. Perfect list! Just what I was looking for. Thanks, Mr. Walsh :-)

  13. nodeset[0];
    $i = $r->new_child(“item”);
    $i->new_child(“title”, $head);
    $i->new_child(“link”, $link);
    $i->new_child(“description”, $comment);

    $out = domxml_dumpmem($doc);
    $file = $arch . “.xml”;
    $f = fopen($file, ‘w’);
    fputs($f, $out);

    echo $out;

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!