Title: Warning array_keys() array_diff() on file codepress-admin-columns.php on line 33
Last modified: August 20, 2016

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# Warning array_keys() array_diff() on file codepress-admin-columns.php on line 33

 *  [Julian](https://wordpress.org/support/users/julianjcecchi/)
 * (@julianjcecchi)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/warning-array_keys-array_diff-on-file-codepress-admin-columnsphp-on-line-33/)
 * Hi,
    I’m using the 1.4.9 version but when I open the plugin admin page, it throws
   the following errors:
 * Warning: array_keys() expects parameter 1 to be array, null given in C:\xampp\
   htdocs\demoweb\wp-content\plugins\codepress-admin-columns\codepress-admin-columns.
   php on line 334
 * Warning: array_diff(): Argument #2 is not an array in C:\xampp\htdocs\demoweb\
   wp-content\plugins\codepress-admin-columns\codepress-admin-columns.php on line
   334
 * Please help!
 * [http://wordpress.org/extend/plugins/codepress-admin-columns/](http://wordpress.org/extend/plugins/codepress-admin-columns/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [Tobias Schutter](https://wordpress.org/support/users/tschutter/)
 * (@tschutter)
 * [13 years, 4 months ago](https://wordpress.org/support/topic/warning-array_keys-array_diff-on-file-codepress-admin-columnsphp-on-line-33/#post-3288432)
 * I will see what I can do about the warning message. But it seems to be triggered
   by another plugin, because both values in the warning should be set.
 * Could you try deactivating all the plugins, and re-activate them one-by-one to
   see if there is any conflict. Thanks.

Viewing 1 replies (of 1 total)

The topic ‘Warning array_keys() array_diff() on file codepress-admin-columns.php
on line 33’ is closed to new replies.

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 * [Admin Columns](https://wordpress.org/plugins/codepress-admin-columns/)
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## Tags

 * [array_diff](https://wordpress.org/support/topic-tag/array_diff/)
 * [warning](https://wordpress.org/support/topic-tag/warning/)

 * 1 reply
 * 2 participants
 * Last reply from: [Tobias Schutter](https://wordpress.org/support/users/tschutter/)
 * Last activity: [13 years, 4 months ago](https://wordpress.org/support/topic/warning-array_keys-array_diff-on-file-codepress-admin-columnsphp-on-line-33/#post-3288432)
 * Status: not resolved