Title: Drop-ins – advanced-cache.php
Last modified: August 21, 2016

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# Drop-ins – advanced-cache.php

 *  Resolved [aiweiwei](https://wordpress.org/support/users/aiweiwei/)
 * (@aiweiwei)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/)
 * Hi all,
 * I have the plugins called: advanced-cache.php
 * at the drop-ins section for a long long time until one day I uninstalled the 
   supercache plugin then it is gone.
 * And I installed the total cache instead and it is fine until a week after, all
   in sudden the same plugin “advanced-cache.php” appeared again in the drop-ins
   section on my wordpress.
 * I tried to deleted it few times via ftp, but the file is back after I resfresh
   the wordpress dashboard page snd I login the ftp again, then the same file is
   there again .
 * What can I do?
 * Is it harmful?
 * Should I uninstall the total cache ?
 * Thx

Viewing 12 replies - 1 through 12 (of 12 total)

 *  Moderator [James Huff](https://wordpress.org/support/users/macmanx/)
 * (@macmanx)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/#post-5046642)
 * It’s part of your caching plugin, don’t remove it without removing the main caching
   plugin. 🙂
 *  Thread Starter [aiweiwei](https://wordpress.org/support/users/aiweiwei/)
 * (@aiweiwei)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/#post-5046643)
 * thx but what can i do ?
 * why does it suddenly at the drop-ins section again?
 *  Moderator [James Huff](https://wordpress.org/support/users/macmanx/)
 * (@macmanx)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/#post-5046644)
 * Because it’s part of Total Cache too. 🙂
 *  Thread Starter [aiweiwei](https://wordpress.org/support/users/aiweiwei/)
 * (@aiweiwei)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/#post-5046645)
 * but it doesnt show up after a week until now?
 * i have installed the total cache for a week, and it should be something suddenly
   make it showing in the drop-ins section?
 * i just wanna fix this
 *  Moderator [James Huff](https://wordpress.org/support/users/macmanx/)
 * (@macmanx)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/#post-5046646)
 * There is nothing to fix. The file is part of W3 Total Cache.
 * [https://plugins.trac.wordpress.org/browser/w3-total-cache/trunk/wp-content/advanced-cache.php](https://plugins.trac.wordpress.org/browser/w3-total-cache/trunk/wp-content/advanced-cache.php)
 *  Thread Starter [aiweiwei](https://wordpress.org/support/users/aiweiwei/)
 * (@aiweiwei)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/#post-5046648)
 * but do u know why it is all in sudden showing in drop-ins section?
 *  Moderator [James Huff](https://wordpress.org/support/users/macmanx/)
 * (@macmanx)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/#post-5046649)
 * It should have been there since the beginning, so I’d assume the better question
   would be, why was it hiding for a week? 🙂
 * I’m not sure, to be honest, but it is where it’s supposed to be now, so there
   really isn’t anything to worry about.
 *  Thread Starter [aiweiwei](https://wordpress.org/support/users/aiweiwei/)
 * (@aiweiwei)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/#post-5046652)
 * Thank you.
 * And actually what is drop-ins?
 * I try to search on wordpress.org but it seems hard to find out to know what it
   is about.
 *  Moderator [James Huff](https://wordpress.org/support/users/macmanx/)
 * (@macmanx)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/#post-5046653)
 * A drop-in is essentially a plugin itself which is required by a primary plugin.
   Rather than telling you to go out and install a required plugin separately, it
   comes with the primary plugin for convenience and so you can’t delete it, since
   it is required. 🙂
 * They really aren’t all that common, to be honest.
 *  Thread Starter [aiweiwei](https://wordpress.org/support/users/aiweiwei/)
 * (@aiweiwei)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/#post-5046657)
 * thx!!! 🙂
 *  Moderator [James Huff](https://wordpress.org/support/users/macmanx/)
 * (@macmanx)
 * [11 years, 9 months ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/#post-5046660)
 * You’re welcome!
 *  [Robert Connor](https://wordpress.org/support/users/rconnor1967/)
 * (@rconnor1967)
 * [11 years ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/#post-5046906)
 * If we deleted the main plugin should we go into ftp and delete “advanced-cache.
   php”. Could the mu-plugin have any negative effects like the problem we are having
   now with my posts and theme not updating? Thanks for any help!

Viewing 12 replies - 1 through 12 (of 12 total)

The topic ‘Drop-ins – advanced-cache.php’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 12 replies
 * 3 participants
 * Last reply from: [Robert Connor](https://wordpress.org/support/users/rconnor1967/)
 * Last activity: [11 years ago](https://wordpress.org/support/topic/drop-ins-advanced-cachephp/#post-5046906)
 * Status: resolved

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