Title: If Modified Since Author: ezraverheijen Published: 2015 年 8 月 17 日 Last modified: 2015 年 8 月 17 日 --- 搜索插件 **该插件尚未通过WordPress的最新3个主要版本进行测试**。 当与较新版本的WordPress一起 使用时，可能不再受到维护或支持，并且可能会存在兼容性问题。 ![](https://s.w.org/plugins/geopattern-icon/if-modified-since.svg) # If Modified Since 作者：[ezraverheijen](https://profiles.wordpress.org/ezraverheijen/) [下载](https://downloads.wordpress.org/plugin/if-modified-since.0.9.zip) * [详情](https://cn.wordpress.org/plugins/if-modified-since/#description) * [评价](https://cn.wordpress.org/plugins/if-modified-since/#reviews) * [安装](https://cn.wordpress.org/plugins/if-modified-since/#installation) * [开发进展](https://cn.wordpress.org/plugins/if-modified-since/#developers) [支持](https://wordpress.org/support/plugin/if-modified-since/) ## 描述 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! ## 安装 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! ## 常见问题 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/) ## 评价 ![](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/) 2018 年 9 月 13 日 1 回复 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/) 2016 年 9 月 3 日 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/) 2016 年 9 月 3 日 Simple and elegant script code. I checked – it stable works! The Author thanks! [ 阅读所有3条评价 ](https://wordpress.org/support/plugin/if-modified-since/reviews/) ## 贡献者及开发者 「If Modified Since」是开源软件。 以下人员对此插件做出了贡献。 贡献者 * [ ezraverheijen ](https://profiles.wordpress.org/ezraverheijen/) [帮助将「If Modified Since」翻译成简体中文。](https://translate.wordpress.org/projects/wp-plugins/if-modified-since) ### 对开发感兴趣吗? 您可以[浏览代码](https://plugins.trac.wordpress.org/browser/if-modified-since/)， 查看[SVN仓库](https://plugins.svn.wordpress.org/if-modified-since/)，或通过[RSS](https://plugins.trac.wordpress.org/log/if-modified-since/?limit=100&mode=stop_on_copy&format=rss) 订阅[开发日志](https://plugins.trac.wordpress.org/log/if-modified-since/)。 ## 更新日志 #### 0.9 * Beta release ## 额外信息 * 版本 **0.9** * 最后更新：**11 年前** * 活跃安装数量 **1,000+** * WordPress 版本 ** 3.5 或更高版本 ** * 已测试的最高版本为 **4.2.39** * 语言 * [English (US)](https://wordpress.org/plugins/if-modified-since/) * 标签 * [if-modified-since](https://cn.wordpress.org/plugins/tags/if-modified-since/) [seo](https://cn.wordpress.org/plugins/tags/seo/) * [高级视图](https://cn.wordpress.org/plugins/if-modified-since/advanced/) ## 评级 3.7 星（最高 5 星）。 * [ 2 条 5 星评价 ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=5) * [ 0 条 4 星评价 ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=4) * [ 0 条 3 星评价 ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=3) * [ 0 条 2 星评价 ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=2) * [ 1 条 1 星评价 ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=1) [Your review](https://wordpress.org/support/plugin/if-modified-since/reviews/#new-post) [查看全部评论](https://wordpress.org/support/plugin/if-modified-since/reviews/) ## 贡献者 * [ ezraverheijen ](https://profiles.wordpress.org/ezraverheijen/) ## 支持 有话要说吗？是否需要帮助？ [查看支持论坛](https://wordpress.org/support/plugin/if-modified-since/) ## 捐助 您愿意支持这个插件的发展吗? [ 捐助此插件 ](http://bit.ly/1eC8iDE)