Undefined Array Key

Hey there, @kissmylegs! Thanks for contacting us. I’m happy to help you.

I’d like to understand your site properly. Please share with us the System Status Report which you can find via WooCommerce > Status > Get system report > Copy for support.

Just to confirm, are you seeing any issues on the website’s front end or just the error messages on the logs?

Looking forward to your reply.

Have a wonderful day!

Thread Starter

(@kissmylegs)

Hi.. I'm only seeing these warnings in my site error logs (in public_html and wp-content). No issues with the site running (that I can tell). These errors were first noted on February 28, 2024. 

My last updates prior to February 28, 2024 were on February 25, 2024 and the plugins that were updated include:
Google XML Sitemaps Generator (1.8.1 -> 1.8.3)
SiteOrigins Widgets Bundle (1.58.6 -> 1.58.7)
WooCommerce (8.6.0 -> 8.6.1)

I have not begun the transition to HPOS and do not suspect this has any bearing on these warnings. I have a test site as well (all plugins and theme are up to date there) and the same warnings are present.

If need be, I can go in to my test environment and start disabling plugins; I cannot do that on my live site though.

I was also seeing errors elsewhere regarding undefined variables. I have gone and corrected those ones as they are outside your plugin. Again, all warnings started (as per log dates) on February 28, 2024. 

Here is the status report:



 WordPress Environment

WordPress address (URL): https://kissmylegs.ca
Site address (URL): https://kissmylegs.ca
WC Version: 8.6.1
REST API Version: ? 8.6.1
WC Blocks Version: ? 11.8.0-dev
Action Scheduler Version: ? 3.7.1
Log Directory Writable: ?
WP Version: 6.4.3
WP Multisite: –
WP Memory Limit: 2 GB
WP Debug Mode: –
WP Cron: ?
Language: en_US
External object cache: – Server Environment

Server Info: Apache
PHP Version: 8.0.30
PHP Post Max Size: 2 GB
PHP Time Limit: 3000
PHP Max Input Vars: 10000
cURL Version: 8.6.0
OpenSSL/1.1.1w

SUHOSIN Installed: –
MySQL Version: 5.7.23-23
Max Upload Size: 2 GB
Default Timezone is UTC: ?
fsockopen/cURL: ?
SoapClient: ?
DOMDocument: ?
GZip: ?
Multibyte String: ?
Remote Post: ?
Remote Get: ? Database

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WC Database Prefix: wp_
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attachment: 5625
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options: 1
page: 77
post: 2
product: 1323
product_variation: 599
revision: 3495
shop_coupon: 172
shop_order: 3908
shop_order_refund: 18
symbol_main_slider: 1
wcbox: 1
wcps: 1
woocarousel: 1
wp_global_styles: 1
ycdcountdown: 3 Security

Secure connection (HTTPS): ?
Hide errors from visitors: ? Active Plugins (29)

FiboSearch - AJAX Search for WooCommerce: by FiboSearch Team – 1.27.0
Role and Customer Based Pricing for WooCommerce: by Meow Crew – 1.5.2
weLaunch Framework: by weLaunch.io – 1.1.1
Canada Post Shipping For WooCommerce: by Small Fish Analytics Inc. – 2.9.14
CM Pop-Up banners for WordPress: by CreativeMindsSolutions – 1.6.2
Admin Columns: by AdminColumns.com – 4.6.1
reCaptcha by BestWebSoft: by BestWebSoft – 1.74
Nav Menu Roles: by Kathy Darling – 2.1.2
PW WooCommerce Gift Cards: by Pimwick
LLC – 1.252

Sezzle WooCommerce Payment: by Sezzle – 5.0.8
Page Builder by SiteOrigin: by SiteOrigin – 2.29.5
SiteOrigin Widgets Bundle: by SiteOrigin – 1.58.9
Tawk.to Live Chat: by Tawkto – 0.8.2
Advanced Editor Tools: by Automattic – 5.9.2
TrustedSite: by TrustedSite – 1.2.0
WPC Fly Cart for WooCommerce: by WPClever – 5.6.5
Orders Tracking for WooCommerce: by VillaTheme – 1.2.7
Variation Swatches for WooCommerce: by Emran Ahmed – 2.0.30
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FOX - Currency Switcher Professional for WooCommerce: by realmag777 – 1.4.1.7
PDF Invoices & Packing Slips for WooCommerce: by WP Overnight – 3.7.7
Woocommerce Products Per Page: by Jeroen Sormani – 1.2.7
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Role Based Price For WooCommerce: by Varun Sridharan – 3.3.7
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Wordfence Security: by Wordfence – 7.11.3
WP-PageNavi: by Lester 'GaMerZ' Chan – 2.94.1
Google XML Sitemaps Generator: by WPGrim – 1.8.4 Inactive Plugins (4)

Classic Editor: by WordPress Contributors – 1.6.3
Redirection: by John Godley – 5.4.2
Restrict Widgets: by dFactory – 1.3.1
Under Construction: by WebFactory Ltd – 3.99 Must Use Plugins (2)

Endurance Page Cache: by Mike Hansen – 2.2
SSO: by Garth Mortensen
Mike Hansen – 0.4 Settings

API Enabled: –
Force SSL: ?
Currency: CAD (CAD$)
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 2
Taxonomies: Product Types: external (external)
grouped (grouped)
pw gift card (pw-gift-card)
simple (simple)
variable (variable)

Taxonomies: Product Visibility: exclude-from-catalog (exclude-from-catalog)
exclude-from-search (exclude-from-search)
featured (featured)
outofstock (outofstock)
rated-1 (rated-1)
rated-2 (rated-2)
rated-3 (rated-3)
rated-4 (rated-4)
rated-5 (rated-5)

Connected to Woo.com: –
Enforce Approved Product Download Directories: –
HPOS feature screen enabled: –
HPOS feature enabled: –
Order datastore: WC_Order_Data_Store_CPT
HPOS data sync enabled: – WC Pages

Shop base: #490 - /shop/
Cart: #491 - /cart/
Checkout: #492 - /checkout/
My account: #493 - /my-account/
Terms and conditions: #653 - /terms/ Theme

Name: Top Shop Child
Version: 1.0.0
Author URL: https://wordpress.com
Child Theme: ?
Parent Theme Name: TopShop
Parent Theme Version: 1.3.14 – 1.3.40 is available
Parent Theme Author URL: https://kairaweb.com/
WooCommerce Support: ? Templates

Overrides: topshop-child/myaccount/dashboard.php Square

Environment: Production
Tokenization Enabled: –
Debug Mode: Off Admin

Enabled Features: activity-panels
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product-block-editor
coupons
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Daily Cron: ? Next scheduled: 2024-03-05 19:23:36 -07:00
Options: ?
Notes: 23
Onboarding: completed Action Scheduler

Complete: 1,331
Oldest: 2024-02-03 20:47:27 +0000
Newest: 2024-03-05 14:53:23 +0000

Failed: 147
Oldest: 2020-06-26 20:38:19 +0000
Newest: 2024-01-29 23:54:11 +0000

Pending: 2
Oldest: 2024-03-05 21:13:09 +0000
Newest: 2024-03-10 20:06:01 +0000 Status report information

Generated at: 2024-03-05 12:21:03 -07:00

Juan G. (woo-hc)

(@judagutor)

Hi @kissmylegs!

Thank you for providing more information.

Checking your system status report, I can’t notice anything causing the undefined array key; it could be related to the recent updates.

You mentioned you have a test site with plugins and theme up to date; let’s try performing a conflict test there and see if that helps to solve the issue.

Please temporarily switch your theme back to Storefront, disable all plugins except WooCommerce, and then check again if the issue persists.

If that solves it, reactivate the theme first and check again. Then, reactivate your other plugins, testing after each, until you find the one causing conflict.

You can find a more detailed explanation of how to do a conflict test here: https://woo.com/document/how-to-test-for-conflicts/

Let us know how that goes for you!

Thread Starter

(@kissmylegs)

I’ll need a week or so to do this as my schedule is very busy. I’ll report back once I have done my testing, so please leave this ticket open for a while.
Thanks – Dave

Thread Starter

(@kissmylegs)

Nevermind. LOL. I believe I have isolated the issue. It was some custom code that renamed the tabs inside a single product page. There is one instance where the product I show does not have the “Additional Information” tab, so the code throws an error (Undefined “title”)!!

Adding this to my custom code seems to have fixed the issue:

if(!isset($tabs[‘additional_information’])) {return $tabs;}

If there is a better way to fix this issue, please let me know.
Sorry for bothering you. This took me only a few hours to diagnose and fix.

Plugin Support

Shameem R. a11n

(@shameemreza)

Hi @kissmylegs,

I’m glad to hear that you were able to identify and rectify the issue with the custom code on your single product page. The solution you implemented seems to be a good one. It checks if the additional_information tab is set before attempting to use it, which prevents the undefined title error.

However, if you want to improve your code further, you might consider adding an else statement to handle cases where the additional_information tab is not set. This could provide a default value or an error message to help with debugging in the future.

I hope this helps!

Meanwhile, I will mark this thread as resolved. Should you have further inquiries, kindly create a new topic here.

Thanks!

Thread Starter

(@kissmylegs)

It looks like I’m still seeing warnings for WooCommerce. I hope it’s okay to post here and not start a new thread, as what I’m reporting today is related to what we already discussed.

Has something changed in core where it's now "suggested" to declare all variables before use? 

Like in:

$myValue;
$myValue = getValue();
if( $myValue == 'Something' )
{...}

Now, I know you'll say getValue() should return something no matter what, and I agree with you. It's just an example where $myValue might not have been set prior to it being tested for a value of 'Something'.

Also:

$myArray = getArray();
$aValue = $myArray[0];
If( $aValue == 'Something' )
{...}
If there is no array at $myArray[0] this is now producing a warning)
So, I would update the code to something like:
if( isset( $myArray[0] ))
{
      $aValue = $myArray[0];
}
else
{
      $aValue = 'something';
}



Code that has worked flawlessly for years is now (sometimes) producing warnings.

--------------------------------------------------------
Here are the latest (WooCommerce) warnings:

[07-Mar-2024 02:10:09 UTC] PHP Warning: Trying to access array offset on value of type bool in /…/public_html/wp-content/plugins/woocommerce/includes/wc-template-functions.php on line 2691

[07-Mar-2024 08:03:46 UTC] PHP Warning: Trying to access array offset on value of type bool in /…/public_html/wp-content/plugins/woocommerce/includes/wc-template-functions.php on line 1611

[07-Mar-2024 08:03:46 UTC] PHP Warning: Trying to access array offset on value of type bool in /…/public_html/wp-content/plugins/woocommerce/includes/wc-template-functions.php on line 1612

[07-Mar-2024 08:03:46 UTC] PHP Warning: Trying to access array offset on value of type bool in /…/public_html/wp-content/plugins/woocommerce/includes/wc-template-functions.php on line 1613

[07-Mar-2024 08:03:46 UTC] PHP Warning: Trying to access array offset on value of type bool in /…/public_html/wp-content/plugins/woocommerce/includes/wc-template-functions.php on line 1614

[07-Mar-2024 08:03:46 UTC] PHP Warning: Trying to access array offset on value of type bool in /…/public_html/wp-content/plugins/woocommerce/includes/wc-template-functions.php on line 1623

Thread Starter

(@kissmylegs)

So, after doing some further research, it seems the issues I am having are not directly related to WooCommerce. It seems things broke with the latest WordPress update. I am now also seeing warnings from some of my other plugins (where just the other day I didn’t see any warnings.) A suggested fix is to add this to wp-config.php:

if ( ! isset( $_SERVER[‘HTTP_HOST’]))
{
$_SERVER[‘HTTP_HOST’] = ‘change to URL of your site’
}

I have gone and added this to my sandbox environment and I will monitor it for a few days to see if the warnings go away. I may even add this to my live site; I’m sure it can’t hurt anything by doing so.

Do you have any other suggestions?

Thanks – Dave

carolm29 (woo-hc)

(@carolm29)

Hey, @kissmylegs!

While my colleague shared some insight, please note that we can’t provide support for code customization as per our support policy.

We suggest visiting the WooCommerce Facebook group or the #developers channel of the WooCommerce Community Slack. We’re lucky to have a great community of open-source developers for WooCommerce, and many of our developers hang out there too.

I hope this was clarifying.

Please let us know if there’s anything else we can do to help or if you have any questions.

Have a wonderful day!

Thread Starter

(@kissmylegs)

Thanks. It sounds like there are many people experiencing the same issues as me (submitting tickets to you) (since WordPress latest update). Even when I switched to Storefront theme, deactivated all plugins, and remove not referencing custom code in my functions.php file; the warnings were still present in my error log file. Hence the only warnings were for WooCommerce though (because other than the WooCommerce plugin being active, WordPress was the only source to blame this on). This issue seems to NOT be caused by your plugin, any of my other plugins, my custom code (functions.php), etc., but solely WordPress (core files).

Thread Starter

(@kissmylegs)

Doing some further research, could this issue be related to the PHP version I am using (v8.0.30)? I have read that other people also experience the same issue (across multiple plugins). They (like I) have tried using just Storefront and disabling all plugins (except WooCommerce) and the problem still exists. I have also received similar warnings from some of my plugins, too.

Thread Starter

(@kissmylegs)

To fix this issue in my sandbox environment, I went to line 2691 in woocommerce/includes/wc-template-functions.php and changed:

$image = $image[0];

to:

if( isset( $image[0] ) )
{
$image = $image[0];
}

For now, this seems to have fixed the issue. I’m still at a loss to decipher whether this is an issue with your code, an issue with WordPress or an issue with PHP v8.0.30

Plugin Support

omarfpg a11n

(@omarfpg)

Hi @kissmylegs,

Thank you for the additional details. I’m happy you’ve fixed this issue for you. From your System Status Report, I see you have WooCommerce and WordPress in your latest versions. Have you tried other PHP versions to rule this out?

Additionally, you mentioned you found the error on your logs:

[05-Mar-2024 16:11:05 UTC] PHP Warning: Trying to access array offset on value of type bool in /…/public_html/wp-content/plugins/woocommerce/includes/wc-template-functions.php on line 2691

I’d like to learn more. Is this something that’s affecting your site in the front end or back end in any way? Do you get any visible errors or something broken / not functioning as expected? Which steps could we take to replicate this issue?

Thanks!
-OP

Thread Starter

(@kissmylegs)