Title: error in class-core.php
Last modified: May 2, 2019

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# error in class-core.php

 *  [critara](https://wordpress.org/support/users/critara/)
 * (@critara)
 * [7 years ago](https://wordpress.org/support/topic/error-in-class-core-php/)
 * The plugin works just fine, so thank you and well done 🙂
    However, I keep getting
   this error:
 * Warning: array_key_exists() expects parameter 2 to be array, null given in /home/
   XXX/XXX/XXX/wp-content/plugins/wp-math-captcha/includes/class-core.php on line
   644
 * It does not seem to prevent the plugin from working but it is obviously something
   you might want to look into.
    Thank you again!

Viewing 1 replies (of 1 total)

 *  [Tilo](https://wordpress.org/support/users/netsales/)
 * (@netsales)
 * [7 years ago](https://wordpress.org/support/topic/error-in-class-core-php/#post-11541728)
 * Hello,
 * I have the same problem…
    Is there any hope for an update? That would be really
   good, because the selection of such good Captcha plug-ins is unfortunately very
   thin.
 * Thanks
    Tilo

Viewing 1 replies (of 1 total)

The topic ‘error in class-core.php’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/wp-math-captcha_2d554b.svg)
 * [Math Captcha](https://wordpress.org/plugins/wp-math-captcha/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wp-math-captcha/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wp-math-captcha/)
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 * [Unresolved Topics](https://wordpress.org/support/plugin/wp-math-captcha/unresolved/)
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## Tags

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

 * 1 reply
 * 2 participants
 * Last reply from: [Tilo](https://wordpress.org/support/users/netsales/)
 * Last activity: [7 years ago](https://wordpress.org/support/topic/error-in-class-core-php/#post-11541728)
 * Status: not resolved