Title: If Modified Since Author: ezraverheijen Published: August 17, 2015 Last modified: August 17, 2015 --- Search plugins This plugin **hasn’t been tested with the latest 3 major releases of WordPress**. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress. ![](https://s.w.org/plugins/geopattern-icon/if-modified-since.svg) # If Modified Since By [ezraverheijen](https://profiles.wordpress.org/ezraverheijen/) [Download](https://downloads.wordpress.org/plugin/if-modified-since.0.9.zip) * [Details](https://pcd.wordpress.org/plugins/if-modified-since/#description) * [Reviews](https://pcd.wordpress.org/plugins/if-modified-since/#reviews) * [Installation](https://pcd.wordpress.org/plugins/if-modified-since/#installation) * [Development](https://pcd.wordpress.org/plugins/if-modified-since/#developers) [Support](https://wordpress.org/support/plugin/if-modified-since/) ## Description 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](https://github.com/ezraverheijen/wp-if-modified-since). If you don’t report it, I can’t fix it! ## Installation 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! ## FAQ 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](https://varvy.com/tools/if-modified/) ## Reviews ![](https://secure.gravatar.com/avatar/a9e1c3b02a34fa228a8b06bc21c3ddf019f45078129cae10f8bd0e474aaef4db? s=60&d=retro&r=g) ### 󠀁[Breaks sites, empty blank pages for normal visitors](https://wordpress.org/support/topic/breaks-sites-empty-blank-pages-for-normal-visitors/)󠁿 [amityweb](https://profiles.wordpress.org/amityweb/) September 13, 2018 1 reply This plugin caused our site to show blank pages often. The site would initially work, then after a reload it was completely blank. No errors or anything. The theme files failed to load, just completely blank. After investigation it turned out to be this plugin. Possibly broken due to be being so old. This description should scare you off anyway which I should guess what was happening to normal users: “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” ![](https://secure.gravatar.com/avatar/5c9f90d4afcd330f8e303dae3d483865c423b4731de5e880e198cabc91464850? s=60&d=retro&r=g) ### 󠀁[Deserves a 5 star](https://wordpress.org/support/topic/deserves-a-5-star/)󠁿 [Jayanta](https://profiles.wordpress.org/jkmwp/) September 3, 2016 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. ![](https://secure.gravatar.com/avatar/e2cd8591ee5454dbadd17260dfb625e47675057ef435bf32698de5a75112d12a? s=60&d=retro&r=g) ### 󠀁[Great!](https://wordpress.org/support/topic/great-4580/)󠁿 [klinsky](https://profiles.wordpress.org/klinsky/) September 3, 2016 Simple and elegant script code. I checked – it stable works! The Author thanks! [ Read all 3 reviews ](https://wordpress.org/support/plugin/if-modified-since/reviews/) ## Contributors & Developers “If Modified Since” is open source software. The following people have contributed to this plugin. Contributors * [ ezraverheijen ](https://profiles.wordpress.org/ezraverheijen/) [Translate “If Modified Since” into your language.](https://translate.wordpress.org/projects/wp-plugins/if-modified-since) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/if-modified-since/), check out the [SVN repository](https://plugins.svn.wordpress.org/if-modified-since/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/if-modified-since/) by [RSS](https://plugins.trac.wordpress.org/log/if-modified-since/?limit=100&mode=stop_on_copy&format=rss). ## Changelog #### 0.9 * Beta release ## Meta * Version **0.9** * Last updated **11 years ago** * Active installations **900+** * WordPress version ** 3.5 or higher ** * Tested up to **4.2.39** * Language * [English (US)](https://wordpress.org/plugins/if-modified-since/) * Tags * [if-modified-since](https://pcd.wordpress.org/plugins/tags/if-modified-since/) [seo](https://pcd.wordpress.org/plugins/tags/seo/) * [Advanced View](https://pcd.wordpress.org/plugins/if-modified-since/advanced/) ## Ratings 3.7 out of 5 stars. * [ 2 5-star reviews ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=5) * [ 0 4-star reviews ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=4) * [ 0 3-star reviews ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=3) * [ 0 2-star reviews ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=2) * [ 1 1-star review ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=1) [Your review](https://wordpress.org/support/plugin/if-modified-since/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/if-modified-since/reviews/) ## Contributors * [ ezraverheijen ](https://profiles.wordpress.org/ezraverheijen/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/if-modified-since/) ## Donate Would you like to support the advancement of this plugin? [ Donate to this plugin ](http://bit.ly/1eC8iDE)