Dieses Plugin wurde seit mehr als 2 Jahren nicht akualisiert! Es könnte daher nicht mehr unterstützt werden und ebenso Kompatibilitätsprobleme bereiten, wenn es mit aktuelleren WordPress-Versionen eingesetzt wird.

If Modified Since


If Modified Since tells search engine spiders one of two things about a webpage:

  • This webpage has not changed, no need to download again.
  • This webpage has changed so download again because there is new information.

If the requested page has not been modified since the time specified by a search engine spider, a 304 (not modified) response will be returned without any message-body.

If you have any issues using If Modified Since, find a bug or have an idea to make the plugin even better then please help to improve If Modified Since.
If you don’t report it, I can’t fix it!


  1. Upload the if-modified-since folder to the /wp-content/plugins/ directory
  2. Activate the plugin through the ‚Plugins‘ menu in WordPress
  3. No need to configure, it just works!


Do I need this when I already use a caching plugin like W3 Total Cache?

Some plugins like W3TC support the If-Modified-Since header, so there’s no need to install this plugin.

How do I know if the plugin works after installing?

You can test If Modified Since here


Deserves a 5 star

Yes, it works. thanks a lot, man. I have been trying to fix it for 3 hours now and your plugin has made it look so easy.


Simple and elegant script code. I checked – it stable works!
The Author thanks!

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Mitwirkende & Entwickler

„If Modified Since“ ist Open-Source-Software. Folgende Menschen haben an diesem Plugin mitgewirkt:


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  • Beta release