Title: Multiple Errors on Install
Last modified: November 21, 2019

---

# Multiple Errors on Install

 *  Resolved [koolpal](https://wordpress.org/support/users/koolpal/)
 * (@koolpal)
 * [6 years, 6 months ago](https://wordpress.org/support/topic/multiple-errors-on-install/)
 * Hi,
 * WP:5.3
    Woocommerce:3.8.0 PHP: 7.3.3
 * I came across multiple errors as soon as I clicked on Advanced Tab:
 *     ```
       [21-Nov-2019 07:59:47 UTC] PHP Notice:  Undefined index: tab in [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\admin\sections\general\top.php on line 12
       [21-Nov-2019 07:59:47 UTC] PHP Notice:  Undefined index: tab in [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\admin\sections\general\top.php on line 13
       [21-Nov-2019 07:59:47 UTC] PHP Notice:  Undefined index: tab in [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\admin\sections\general\top.php on line 14
       [21-Nov-2019 08:00:04 UTC] PHP Notice:  Undefined index: tab in [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\admin\sections\general\top.php on line 12
       [21-Nov-2019 08:00:04 UTC] PHP Notice:  Undefined index: tab in [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\admin\sections\general\top.php on line 13
       [21-Nov-2019 08:00:04 UTC] PHP Notice:  Undefined index: tab in [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\admin\sections\general\top.php on line 14
       [21-Nov-2019 08:00:08 UTC] PHP Warning:  Use of undefined constant new_order - assumed 'new_order' (this will throw an Error in a future version of PHP) in [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\whpdf_admin.php on line 260
       [21-Nov-2019 08:00:08 UTC] PHP Warning:  Use of undefined constant completed - assumed 'completed' (this will throw an Error in a future version of PHP) in [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\whpdf_admin.php on line 261
       [21-Nov-2019 08:00:08 UTC] PHP Warning:  Use of undefined constant on_hold - assumed 'on_hold' (this will throw an Error in a future version of PHP) in [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\whpdf_admin.php on line 262
       [21-Nov-2019 08:00:08 UTC] PHP Warning:  Use of undefined constant processing - assumed 'processing' (this will throw an Error in a future version of PHP) in [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\whpdf_admin.php on line 263
       [21-Nov-2019 08:00:08 UTC] PHP Warning:  Use of undefined constant customer_invoice - assumed 'customer_invoice' (this will throw an Error in a future version of PHP) in [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\whpdf_admin.php on line 264
       ```
   
 * Please guide me.
 * Thanks

Viewing 6 replies - 1 through 6 (of 6 total)

 *  Plugin Author [wphobby](https://wordpress.org/support/users/darell/)
 * (@darell)
 * [6 years, 3 months ago](https://wordpress.org/support/topic/multiple-errors-on-install/#post-12413768)
 * [@koolpal](https://wordpress.org/support/users/koolpal/) We have fixed the PHP
   Notices and Warning on the new version, please update the version to 1.0.3 and
   check it again, Thanks. Regards.
 *  Thread Starter [koolpal](https://wordpress.org/support/users/koolpal/)
 * (@koolpal)
 * [6 years, 3 months ago](https://wordpress.org/support/topic/multiple-errors-on-install/#post-12413925)
 * [@darell](https://wordpress.org/support/users/darell/)
 * Got new errors after the update:
 *     ```
       [09-Feb-2020 05:52:59 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\whpdf_document.php:361) in [path]\wp-includes\functions.php on line 6029
       [09-Feb-2020 05:52:59 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\whpdf_document.php:361) in [path]\wp-admin\includes\misc.php on line 1252
       [09-Feb-2020 05:52:59 UTC] PHP Warning:  Cannot modify header information - headers already sent by (output started at [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\whpdf_document.php:361) in [path]\wp-admin\admin-header.php on line 9
       [09-Feb-2020 05:55:45 UTC] PHP Notice:  Undefined index: tab in [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\admin\sections\help\top.php on line 12
       [09-Feb-2020 05:55:45 UTC] PHP Notice:  Undefined index: tab in [path]\wp-content\plugins\wphobby-pdf-invoices-for-woocommerce\includes\admin\sections\help\top.php on line 13
       ```
   
 * Please guide me.
 * Thanks
 *  Plugin Author [wphobby](https://wordpress.org/support/users/darell/)
 * (@darell)
 * [6 years, 3 months ago](https://wordpress.org/support/topic/multiple-errors-on-install/#post-12415710)
 * [@koolpal](https://wordpress.org/support/users/koolpal/) I can’t reproduce these
   PHP Notice and Warning on my side, because the PHP version is different, I think
   turn off the “define( ‘WP_DEBUG’, false );” on wp-config.php if you don’t want
   to show these notices and warnings.
 *  Plugin Author [wphobby](https://wordpress.org/support/users/darell/)
 * (@darell)
 * [6 years, 3 months ago](https://wordpress.org/support/topic/multiple-errors-on-install/#post-12415718)
 * [@koolpal](https://wordpress.org/support/users/koolpal/) I need your website 
   wp-admin info so I can reproduce the PHP Notice and Warning on your site. You
   can send me the wp-admin info to my email [darell1986@gmail.com](https://wordpress.org/support/topic/multiple-errors-on-install/darell1986@gmail.com?output_format=md),
   I will fix this issue for you, thanks.
 *  Thread Starter [koolpal](https://wordpress.org/support/users/koolpal/)
 * (@koolpal)
 * [6 years, 3 months ago](https://wordpress.org/support/topic/multiple-errors-on-install/#post-12416242)
 * [@darell](https://wordpress.org/support/users/darell/)
 * I am testing your plugin on localhost.
 * WooCommerce version: 3.9.1
    WordPress version: 5.3.2 PHP version: 7.3.3
 * Please see if this helps.
 * Turning OFF wp_debug is not exactly a solution.
 *  Plugin Author [wphobby](https://wordpress.org/support/users/darell/)
 * (@darell)
 * [5 years, 10 months ago](https://wordpress.org/support/topic/multiple-errors-on-install/#post-13110459)
 * I have fixed these Notices in the latest plugin version, please let me know if
   you have any other questions, Thanks.

Viewing 6 replies - 1 through 6 (of 6 total)

The topic ‘Multiple Errors on Install’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/wphobby-pdf-invoices-for-woocommerce_573a38.
   svg)
 * [WooCommerce PDF Invoices Maker](https://wordpress.org/plugins/wphobby-pdf-invoices-for-woocommerce/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wphobby-pdf-invoices-for-woocommerce/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wphobby-pdf-invoices-for-woocommerce/)
 * [Active Topics](https://wordpress.org/support/plugin/wphobby-pdf-invoices-for-woocommerce/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wphobby-pdf-invoices-for-woocommerce/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wphobby-pdf-invoices-for-woocommerce/reviews/)

 * 6 replies
 * 2 participants
 * Last reply from: [wphobby](https://wordpress.org/support/users/darell/)
 * Last activity: [5 years, 10 months ago](https://wordpress.org/support/topic/multiple-errors-on-install/#post-13110459)
 * Status: resolved