[3.0.*] Cannot use the wc_get_attribute_taxonomies function after including it

[royvanos]

EXPLANATION OF THE ISSUE

I'm trying to get all attribute taxonomies for my plugin using the wc_get_attribute_taxonomies function which is declared in woocommerce/includes/wc-attribute-functions.php, however, when I call the function, I get the following error:

Fatal error: Cannot redeclare wc_attributes_array_filter_variation() (previously declared in /home/roy/www/wcconnector/web/wp-content/plugins/woocommerce/includes/wc-attribute-functions.php:321) in /home/roy/www/wcconnector/web/wp-content/plugins/woocommerce/includes/wc-attribute-functions.php on line 321

STEPS TO REPRODUCE THE ISSUE

1. WooCommerce version 3.0.*
2. PHP 7.0.12
3. Apache 2.4.18

SYSTEM STATUS

WordPress Environment

Home URL: http://wcconnector.local
Site URL: http://wcconnector.local
WC Version: 3.0.1
Log Directory Writable: ✔
WP Version: 4.8-alpha-40387
WP Multisite: –
WP Memory Limit: 8 GB
WP Debug Mode: –
WP Cron: ✔
Language: en_US

Server Environment

Server Info: Apache/2.4.18 (Ubuntu)
PHP Version: 7.0.12-1+deb.sury.org~xenial+1
PHP Post Max Size: 2 GB
PHP Time Limit: 0
PHP Max Input Vars: 1000
cURL Version: 7.47.0
OpenSSL/1.0.2g

SUHOSIN Installed: –
MySQL Version: 5.7.11
Max Upload Size: 2 GB
Default Timezone is UTC: ✔
fsockopen/cURL: ✔
SoapClient: ✔
DOMDocument: ✔
GZip: ✔
Multibyte String: ✔
Remote Post: ✔
Remote Get: ✔

Database

WC Database Version: 3.0.1
WC Database Prefix: aawcc_
woocommerce_sessions: ✔
woocommerce_api_keys: ✔
woocommerce_attribute_taxonomies: ✔
woocommerce_downloadable_product_permissions: ✔
woocommerce_order_items: ✔
woocommerce_order_itemmeta: ✔
woocommerce_tax_rates: ✔
woocommerce_tax_rate_locations: ✔
woocommerce_shipping_zones: ✔
woocommerce_shipping_zone_locations: ✔
woocommerce_shipping_zone_methods: ✔
woocommerce_payment_tokens: ✔
woocommerce_payment_tokenmeta: ✔
MaxMind GeoIP Database: ✔

Security

Secure connection (HTTPS): ❌Your store is not using HTTPS. Learn more about HTTPS and SSL Certificates.
Hide errors from visitors: ✔

Active Plugins (4)

Test Payment Module for Woocommerce: by Sean Barton (Tortoise IT) – 1.5
Active Ants WooCommerce Connector: by Active Ants B.V. – 1.0.0
WooCommerce: by Automattic – 3.0.1
WordPress Importer: by wordpressdotorg – 0.6.3

Settings

API Enabled: ✔
Force SSL: –
Currency: EUR (€)
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 2
Taxonomies: Product Types: external (external)
grouped (grouped)
simple (simple)
variable (variable)

WC Pages

Shop base: #13 - /shop/
Cart: #14 - /cart/
Checkout: #15 - /checkout/
My account: #16 - /my-account/

Theme

Name: Shapely
Version: 1.1.2
Author URL: https://colorlib.com/
Child Theme: ❌ – If you're modifying WooCommerce on a parent theme you didn't build personally
then we recommend using a child theme. See: How to create a child theme

WooCommerce Support: ❌ Not declared

Templates

Overrides: –

ADDITIONAL NOTES

I can currently work around this issue by copying the code from the wc_get_attribute_taxonomies function.

[mikejolley]

Do not include the file. That will mean you include it and then WC includes it later. This is a problem in your code. Run it later (after init) once the files are included.