Title: Undefined index: class-is.php
Last modified: February 21, 2022

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# Undefined index: class-is.php

 *  Resolved [vaelostudio](https://wordpress.org/support/users/vaelostudio/)
 * (@vaelostudio)
 * [4 years, 3 months ago](https://wordpress.org/support/topic/undefined-index-class-is-php/)
 * Hi guys,
    we receive this error: Undefined index: Undefined index: action in ..\
   wp-content\plugins\add-search-to-menu\includes\class-is.php on line 66 PHP 7.4.18
   Any idea?
 * Thanks
    -  This topic was modified 4 years, 3 months ago by [vaelostudio](https://wordpress.org/support/users/vaelostudio/).

Viewing 8 replies - 1 through 8 (of 8 total)

 *  Plugin Author [Vinod Dalvi](https://wordpress.org/support/users/vinod-dalvi/)
 * (@vinod-dalvi)
 * [4 years, 3 months ago](https://wordpress.org/support/topic/undefined-index-class-is-php/#post-15387345)
 * Sorry to hear about the problem you are having.
 * Could you please tell me where you are getting this error and are you using the
   latest version of the plugin?
 * Best regards,
 *  Thread Starter [vaelostudio](https://wordpress.org/support/users/vaelostudio/)
 * (@vaelostudio)
 * [4 years, 3 months ago](https://wordpress.org/support/topic/undefined-index-class-is-php/#post-15389151)
 * We using the latest update.
    Error is generated each 5 sec. and appear every 
   ware on website (we use search forms every ware).
 *  [webdad2000](https://wordpress.org/support/users/webdad2000/)
 * (@webdad2000)
 * [4 years, 3 months ago](https://wordpress.org/support/topic/undefined-index-class-is-php/#post-15389308)
 * I am seeing the exact same thing. It seems to be generated only when I try to
   edit a post, and then I get a 500 Error and this is dropped in debug.log
 *  Plugin Author [Vinod Dalvi](https://wordpress.org/support/users/vinod-dalvi/)
 * (@vinod-dalvi)
 * [4 years, 3 months ago](https://wordpress.org/support/topic/undefined-index-class-is-php/#post-15389674)
 * Could you please try using the latest released plugin version 5.4.3?
 *  Thread Starter [vaelostudio](https://wordpress.org/support/users/vaelostudio/)
 * (@vaelostudio)
 * [4 years, 3 months ago](https://wordpress.org/support/topic/undefined-index-class-is-php/#post-15390621)
 * Hi, we update to latest version.
    For now we don’t receive this error.
 * Thanks
 *  Plugin Author [Vinod Dalvi](https://wordpress.org/support/users/vinod-dalvi/)
 * (@vinod-dalvi)
 * [4 years, 3 months ago](https://wordpress.org/support/topic/undefined-index-class-is-php/#post-15391844)
 * Thank you for the confirmation.
 *  [webdad2000](https://wordpress.org/support/users/webdad2000/)
 * (@webdad2000)
 * [4 years, 3 months ago](https://wordpress.org/support/topic/undefined-index-class-is-php/#post-15392247)
 * I installed the update, and the error appears to have gone away as well.
 *  Plugin Author [Vinod Dalvi](https://wordpress.org/support/users/vinod-dalvi/)
 * (@vinod-dalvi)
 * [4 years, 3 months ago](https://wordpress.org/support/topic/undefined-index-class-is-php/#post-15392376)
 * Glad to hear that.

Viewing 8 replies - 1 through 8 (of 8 total)

The topic ‘Undefined index: class-is.php’ is closed to new replies.

 * ![](https://ps.w.org/add-search-to-menu/assets/icon-256x256.png?rev=2077748)
 * [Ivory Search - WordPress Search Plugin](https://wordpress.org/plugins/add-search-to-menu/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/add-search-to-menu/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/add-search-to-menu/)
 * [Active Topics](https://wordpress.org/support/plugin/add-search-to-menu/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/add-search-to-menu/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/add-search-to-menu/reviews/)

 * 8 replies
 * 3 participants
 * Last reply from: [Vinod Dalvi](https://wordpress.org/support/users/vinod-dalvi/)
 * Last activity: [4 years, 3 months ago](https://wordpress.org/support/topic/undefined-index-class-is-php/#post-15392376)
 * Status: resolved