Title: Function of advanced-cache.php
Last modified: December 8, 2022

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# Function of advanced-cache.php

 *  Resolved [pinoooo](https://wordpress.org/support/users/pinoooo/)
 * (@pinoooo)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/function-of-advanced-cache-php/)
 * What is the exact function of the Drop-in advanced-cache.php? What exactly does
   it do?
    And is it still used?

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Plugin Support [Daniela Ivanova](https://wordpress.org/support/users/daniellaivanova/)
 * (@daniellaivanova)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/function-of-advanced-cache-php/#post-16271007)
 * Hello [@pinoooo](https://wordpress.org/support/users/pinoooo/),
 * The advanced-cache.php file is used by most of the caching plugins to store information
   about full-page caching. Basically, its purpose is to check if the cache is valid,
   when, and which cache is to be served.
 * The file is still being used by the SG Optimizer plugin.
 * Best regards,
    Daniela Ivanova
 *  Thread Starter [pinoooo](https://wordpress.org/support/users/pinoooo/)
 * (@pinoooo)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/function-of-advanced-cache-php/#post-16274292)
 * Thanks for your explanation. I was curious about this because somehow the advanced-
   cache.php drop-in disappeared for me. (probably when deactivating and activating
   the plugin)
    I manually reinstalled SGO (upload sg-cachepress.zip), but this 
   drop-in is not coming back either? I also checked the folder /wp-content/ There
   is also no deactivated (renamed) drop-in present here.
 *  Plugin Support [Vladimir Trandev](https://wordpress.org/support/users/vtrandev/)
 * (@vtrandev)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/function-of-advanced-cache-php/#post-16275156)
 * Hello [@pinoooo](https://wordpress.org/support/users/pinoooo/),
 * The advanced-cache.php and sgo-config.php files refer to our File-based Caching.
 * Both files are created under the wp-content/ folder once the mentioned option
   is activated. The advanced-cache.php file is the dropin and sgo-config.php file
   contains configuration of excluded cookies, cache directory, secret key, logged
   in cookie.
 * For more information about our File-based Caching, please check our tutorial:
 * [https://www.siteground.com/tutorials/wordpress/sg-optimizer/supercacher/#File-based_Caching](https://www.siteground.com/tutorials/wordpress/sg-optimizer/supercacher/#File-based_Caching)
 * Regards,
    Vladimir
 *  Thread Starter [pinoooo](https://wordpress.org/support/users/pinoooo/)
 * (@pinoooo)
 * [3 years, 6 months ago](https://wordpress.org/support/topic/function-of-advanced-cache-php/#post-16275590)
 * Thanks for this additional explanation.
    Despite having the File-based Caching
   option turned on, the advanced-cache.php file was missing. Disabling and enabling
   the File-based Caching option resolves the issue. Thank you!
 *  [seoservicesbristollimited](https://wordpress.org/support/users/seoservicesbristollimited/)
 * (@seoservicesbristollimited)
 * [3 years, 1 month ago](https://wordpress.org/support/topic/function-of-advanced-cache-php/#post-16716260)
 * Interesting topic since I was wondering how some of my sites were showing only
   one **Drop-in** while others were showing two…
 * Also confusing is that only the **object-cache.php** displays details such as“
   _Memcached Dropin for SGO Version 1.0.0_“, hence why I initially thought that
   the **advanced-cache.php** was remains of an other cache plugin -than the SG 
   Optimizer…
 * Thanks [@pinoooo](https://wordpress.org/support/users/pinoooo/) for your last
   tip. Doing the same (disabling and re-enabling the **File-Based** Caching option)
   fixed the issue for my sites missing the 2nd drop-in file too.

Viewing 5 replies - 1 through 5 (of 5 total)

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## Tags

 * [advanced-cache.php](https://wordpress.org/support/topic-tag/advanced-cache-php/)
 * [object-cache.php](https://wordpress.org/support/topic-tag/object-cache-php/)

 * 7 replies
 * 4 participants
 * Last reply from: [seoservicesbristollimited](https://wordpress.org/support/users/seoservicesbristollimited/)
 * Last activity: [3 years, 1 month ago](https://wordpress.org/support/topic/function-of-advanced-cache-php/#post-16716260)
 * Status: resolved