Title: If Modified Since Author: ezraverheijen Published: 17 de agosto de 2015 Last modified: 17 de agosto de 2015 --- Buscar plugins Este plugin **no se ha probado con las últimas 3 versiones mayores de WordPress**. Puede que ya no tenga soporte ni lo mantenga nadie, o puede que tenga problemas de compatibilidad cuando se usa con las versiones más recientes de WordPress. ![](https://s.w.org/plugins/geopattern-icon/if-modified-since.svg) # If Modified Since Por [ezraverheijen](https://profiles.wordpress.org/ezraverheijen/) [Descargar](https://downloads.wordpress.org/plugin/if-modified-since.0.9.zip) * [Detalles](https://es.wordpress.org/plugins/if-modified-since/#description) * [Valoraciones](https://es.wordpress.org/plugins/if-modified-since/#reviews) * [Instalación](https://es.wordpress.org/plugins/if-modified-since/#installation) * [Desarrollo](https://es.wordpress.org/plugins/if-modified-since/#developers) [Soporte](https://wordpress.org/support/plugin/if-modified-since/) ## Descripción 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! ## Instalación 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/) ## Reseñas ![](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/) 13 de septiembre de 2018 1 respuesta 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/) 3 de septiembre de 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/) 3 de septiembre de 2016 Simple and elegant script code. I checked – it stable works! The Author thanks! [ Leer todas las 3 reseñas ](https://wordpress.org/support/plugin/if-modified-since/reviews/) ## Colaboradores y desarrolladores «If Modified Since» es un software de código abierto. Las siguientes personas han colaborado con este plugin. Colaboradores * [ ezraverheijen ](https://profiles.wordpress.org/ezraverheijen/) [Traduce «If Modified Since» a tu idioma.](https://translate.wordpress.org/projects/wp-plugins/if-modified-since) ### ¿Interesado en el desarrollo? [Revisa el código](https://plugins.trac.wordpress.org/browser/if-modified-since/), echa un vistazo al [repositorio SVN](https://plugins.svn.wordpress.org/if-modified-since/) o suscríbete al [registro de desarrollo](https://plugins.trac.wordpress.org/log/if-modified-since/) por [RSS](https://plugins.trac.wordpress.org/log/if-modified-since/?limit=100&mode=stop_on_copy&format=rss). ## Registro de cambios #### 0.9 * Beta release ## Meta * Versión **0.9** * Última actualización **hace 11 años** * Instalaciones activas **1.000+** * Versión de WordPress ** 3.5 o superior ** * Probado hasta **4.2.39** * Idioma * [English (US)](https://wordpress.org/plugins/if-modified-since/) * Etiquetas: * [if-modified-since](https://es.wordpress.org/plugins/tags/if-modified-since/) [seo](https://es.wordpress.org/plugins/tags/seo/) * [Vista avanzada](https://es.wordpress.org/plugins/if-modified-since/advanced/) ## Valoraciones 3.7 de 5 estrellas. * [ 2 valoraciones de 5 estrellas ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=5) * [ 0 valoraciones de 4 estrellas ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=4) * [ 0 valoraciones de 3 estrellas ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=3) * [ 0 valoraciones de 2 estrellas ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=2) * [ 1 valoración de 1 estrellas ](https://wordpress.org/support/plugin/if-modified-since/reviews/?filter=1) [Your review](https://wordpress.org/support/plugin/if-modified-since/reviews/#new-post) [Ver todas las valoraciones](https://wordpress.org/support/plugin/if-modified-since/reviews/) ## Colaboradores * [ ezraverheijen ](https://profiles.wordpress.org/ezraverheijen/) ## Soporte ¿Tienes algo que decir? ¿Necesitas ayuda? [Ver el foro de soporte](https://wordpress.org/support/plugin/if-modified-since/) ## Donar ¿Te gustaría apoyar el progreso de este plugin? [ Dona a este plugin ](http://bit.ly/1eC8iDE)