Title: Undefined offset
Last modified: June 4, 2018

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# Undefined offset

 *  Resolved [mr_fanatic](https://wordpress.org/support/users/mr_fanatic/)
 * (@mr_fanatic)
 * [8 years ago](https://wordpress.org/support/topic/undefined-offset-31/)
 * I don’t know what is causing the issue, but i got continuos error from this line
   coming from debug log.
    `PHP Notice: Undefined offset: 0 in /home/user/public_html/
   wp-content/plugins/widget-css-classes/includes/widget-css-classes.class.php on
   line 458`
 * Wordpress: 4.9.6
    Plugin: 1.5.2.1
    -  This topic was modified 8 years ago by [mr_fanatic](https://wordpress.org/support/users/mr_fanatic/).

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [Jory Hogeveen](https://wordpress.org/support/users/keraweb/)
 * (@keraweb)
 * [8 years ago](https://wordpress.org/support/topic/undefined-offset-31/#post-10359529)
 * Hi [@mr_fanatic](https://wordpress.org/support/users/mr_fanatic/),
 * What other plugins do you have installed? Could be an compatibility issue..
 * Thanks, Jory
 *  Thread Starter [mr_fanatic](https://wordpress.org/support/users/mr_fanatic/)
 * (@mr_fanatic)
 * [8 years ago](https://wordpress.org/support/topic/undefined-offset-31/#post-10364625)
 * i’ve got tons of plugins loaded. That error comes only when debugging is enabled
   in wpconfig, so this is not a big issue. I just wanna let you guys know it since
   this is a useful plugins 🙂
 *  Plugin Author [Jory Hogeveen](https://wordpress.org/support/users/keraweb/)
 * (@keraweb)
 * [8 years ago](https://wordpress.org/support/topic/undefined-offset-31/#post-10364944)
 * Hi [@mr_fanatic](https://wordpress.org/support/users/mr_fanatic/),
 * The reason for this bug is because some code (most likely in a plugin) handles
   widgets differently than WordPress but still uses it’s filters.
    We’ll have to
   know when this happens and with what plugin before we can debug anything.
 * The reason that you are only seeing this notice with debug enabled is because
   these notices are otherwise invisible (only visible on the server logs).
 * It would be great if we could get more info or maybe even the plugin that triggers
   this change so we can create a fix for it.
 * Thanks, Jory

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Undefined offset’ is closed to new replies.

 * ![](https://ps.w.org/widget-css-classes/assets/icon-256x256.jpg?rev=1130657)
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 * 3 replies
 * 2 participants
 * Last reply from: [Jory Hogeveen](https://wordpress.org/support/users/keraweb/)
 * Last activity: [8 years ago](https://wordpress.org/support/topic/undefined-offset-31/#post-10364944)
 * Status: resolved