Title: Warning: array_key_exists() [function.array-key-exists] Last modified: August 20, 2016 --- # Warning: array_key_exists() [function.array-key-exists] * Resolved [passiman](https://wordpress.org/support/users/passiman/) * (@passiman) * [13 years, 3 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/) * I am getting this error on sidebar widget * Warning: array_key_exists() [function.array-key-exists]: The first argument should be either a string or an integer in \wp-includes\cache.php on line 618 * [http://wordpress.org/extend/plugins/rating-widget/](http://wordpress.org/extend/plugins/rating-widget/) Viewing 12 replies - 1 through 12 (of 12 total) * Plugin Author [Vova Feldman](https://wordpress.org/support/users/svovaf/) * (@svovaf) * [13 years, 3 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/#post-3448766) * Hi [@passiman](https://wordpress.org/support/users/passiman/), * The mentioned file, `\wp-includes\cache.php` isn’t part of the Rating-Widget plugin. Why do you think it’s related? * Thread Starter [passiman](https://wordpress.org/support/users/passiman/) * (@passiman) * [13 years, 3 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/#post-3448773) * Hi Vova * I am not very good with programming just use the plugins. Buddy what’s a solution I do use the wp cache plugin for caching, any alternatives you can suggest please? * Thanks * Plugin Author [Vova Feldman](https://wordpress.org/support/users/svovaf/) * (@svovaf) * [13 years, 3 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/#post-3448774) * One simple way to hide the warning is by adding ‘@’ before the method. Just open the file on the specified line, and replace `array_key_exists` with `@array_key_exists`. That should do the job. * **Note:** This is not a solution , you should contact the plugin developer to solve this. * Best! * [Jaabie](https://wordpress.org/support/users/jamieacowangmailcom/) * (@jamieacowangmailcom) * [13 years, 3 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/#post-3448777) * I have a similar error and I do not have any cache plugins activate? * I did have super-cache and ‘DB cache reloaded’ installed with my theme but i have them deactivated at present. * Its odd because the error does not show on every page the widget is on, just some. * Plugin Author [Vova Feldman](https://wordpress.org/support/users/svovaf/) * (@svovaf) * [13 years, 3 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/#post-3448778) * @Jaabie, as mentioned before, `\wp-includes\cache.php` have nothing to do with the Rating-Widget plugin. * [vgevge](https://wordpress.org/support/users/vgevge/) * (@vgevge) * [13 years, 2 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/#post-3448779) * I am having the same error exactly. * The only way to fix it is to disable the Rating-Widget Plugin. * [vgevge](https://wordpress.org/support/users/vgevge/) * (@vgevge) * [13 years, 2 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/#post-3448780) * The error just showed up today. I had never seen it before, no changes were made to my blog, and the error just suddenly showed up on my PHP error log again, and again, and again. * Plugin Author [Vova Feldman](https://wordpress.org/support/users/svovaf/) * (@svovaf) * [13 years, 2 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/#post-3448781) * [@vgevge](https://wordpress.org/support/users/vgevge/) are you sure the error happens at `\wp-includes\cache.php`? * [vgevge](https://wordpress.org/support/users/vgevge/) * (@vgevge) * [13 years, 2 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/#post-3448782) * yes Warning: array_key_exists() [function.array-key-exists]: The first argument should be either a string or an integer in \wp-includes\cache.php on line 618 * Disabling the cache doesn’t fix it. * Plugin Author [Vova Feldman](https://wordpress.org/support/users/svovaf/) * (@svovaf) * [13 years, 2 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/#post-3448783) * And disabling the Rating-Widget solves this? * [vgevge](https://wordpress.org/support/users/vgevge/) * (@vgevge) * [13 years, 2 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/#post-3448785) * yes * Plugin Author [Vova Feldman](https://wordpress.org/support/users/svovaf/) * (@svovaf) * [13 years, 2 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/#post-3448786) * That’s really strange. There’s only one usage of this function in our code, but we are just using it. Honestly, I don’t have a clue why this warning pops up, but you can easily work around it by disabling the warnings echo. Just append the following lines to the end of your **wp-config.php** file: * ``` error_reporting(E_ERROR); ini_set('error_reporting', E_ERROR); ini_set('display_errors',false); ini_set('html_errors', false); ``` * Let me know if it resolved the issue. Viewing 12 replies - 1 through 12 (of 12 total) The topic ‘Warning: array_key_exists() [function.array-key-exists]’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/rating-widget_4db0e0.svg) * [Rating-Widget: Star Review System](https://wordpress.org/plugins/rating-widget/) * [Frequently Asked Questions](https://wordpress.org/plugins/rating-widget/#faq) * [Support Threads](https://wordpress.org/support/plugin/rating-widget/) * [Active Topics](https://wordpress.org/support/plugin/rating-widget/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/rating-widget/unresolved/) * [Reviews](https://wordpress.org/support/plugin/rating-widget/reviews/) * 12 replies * 4 participants * Last reply from: [Vova Feldman](https://wordpress.org/support/users/svovaf/) * Last activity: [13 years, 2 months ago](https://wordpress.org/support/topic/warning-array_key_exists-functionarray-key-exists-2/#post-3448786) * Status: resolved