Title: Call to undefined function get_real_customer_ip Last modified: July 16, 2025 --- # Call to undefined function get_real_customer_ip * Resolved [Marcus](https://wordpress.org/support/users/power2009/) * (@power2009) * [9 months, 1 week ago](https://wordpress.org/support/topic/call-to-undefined-function-get_real_customer_ip/) * **Issue Summary:** A recurring error is occurring on the website `mywebSite.com` within the `wc-blacklist-manager` plugin. The error logs indicate that the function` get_real_customer_ip()` is undefined, resulting in a fatal error in the file `/ wp-content/plugins/wc-blacklist-manager/inc/backend/actions/form/yobm-wc-blacklist- manager-gravity-forms.php` at line 57. The errors occur multiple times, between` 2025-07-16 20:58:27` and `2025-07-16 21:05:01 UTC`, which suggests repeated failed attempts by a user or bot interacting with a Gravity Forms submission. * **Steps to Reproduce:** 1. Visit the website using a form created with Gravity Forms. 2. Trigger a submission of the form (either by a user or possibly a bot). 3. The error is logged in the system. * **Error Logs:** * The log indicates that a fatal error occurs due to the undefined function `get_real_customer_ip()` in the `yobm-wc-blacklist-manager-gravity-forms.php` file, specifically at line 57. Issue Analysis: * The error arises when the method `WC_Blacklist_Manager_Gravity_Forms->gf_blacklist_validation()` is hooked into the Gravity Forms validation process. The function `get_real_customer_ip()` appears to be used to retrieve the client’s IP address for blacklist validation but is either missing or incorrectly referenced in the plugin. Possible Causes: - **Missing Function Definition:** The function `get_real_customer_ip()` is not defined within the plugin or any of the included files. - **Plugin Incompatibility:** The plugin might depend on WooCommerce or another plugin that should define `get_real_customer_ip()`, but the dependency may not be installed or activated. - **Code Update Issue:** A recent update might have removed or renamed the function, causing the current issue. - **Custom Implementation Missing:** The function might be expected but wasn’t implemented in the theme or another plugin. * **Recommendations for Resolution:** 1. **Check for Plugin Updates:** Ensure the `wc-blacklist-manager` plugin is up to date. If an update is available, apply it and test the form submission again. 2. **Verify Plugin Dependencies:** Ensure that all required plugins (e.g., WooCommerce, Gravity Forms) are installed and active. Check the plugin documentation for any dependencies. The function `get_real_customer_ip()` might be provided by WooCommerce or another related plugin. 3. **Search for the Function Definition:** Use a code editor or SSH to search the WordPress installation for `get_real_customer_ip()` to ensure that the function exists: `grep -r "function get_real_customer_ip" /path/to/website/` If found, verify that the file defining it is included correctly in `yobm-wc-blacklist- manager-gravity-forms.php`. 4. **Temporary Workaround:** If the function is missing, define a fallback version temporarily. Add the following code in `yobm-wc-blacklist-manager-gravity-forms. php` before line 57: `if (!function_exists('get_real_customer_ip')) { function get_real_customer_ip() { $ip = $_SERVER['REMOTE_ADDR'] ?? '0.0.0.0'; if (!empty( $_SERVER['HTTP_CLIENT_IP'])) { $ip = $_SERVER['HTTP_CLIENT_IP']; } elseif (! empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];} return $ip; } }` This will temporarily address the issue but may not fully match the plugin’s intended functionality. Ensure testing after implementation. 5. **Disable the Blacklist Validation Temporarily:** If the blacklist feature isn’t critical, you can disable the `gf_blacklist_validation` hook by commenting it out: `// add_filter('gform_validation', [ $this, 'gf_blacklist_validation' ]);` 6. **Contact Plugin Support:** Reach out to the `wc-blacklist-manager` plugin’s support team or check their documentation for known issues with `get_real_customer_ip()`. Provide the error details and relevant version information. * **Additional Notes:** - The frequency of errors (every 10-20 seconds) suggests the issue may be triggered by a bot or automated script. Consider adding CAPTCHA or rate-limiting to reduce these attempts. - Before making changes, ensure you have backups of the website. - If you are not comfortable editing code, consider involving a developer or your hosting provider’s support team. * Version 2.0.5 Viewing 1 replies (of 1 total) * Plugin Contributor [B.Ng](https://wordpress.org/support/users/baonguyen0310/) * (@baonguyen0310) * [9 months, 1 week ago](https://wordpress.org/support/topic/call-to-undefined-function-get_real_customer_ip/#post-18558927) * Thank you for reporting. * We will release a fix within the next version. Viewing 1 replies (of 1 total) The topic ‘Call to undefined function get_real_customer_ip’ is closed to new replies. * ![](https://ps.w.org/wc-blacklist-manager/assets/icon.svg?rev=3109846) * [Blacklist Manager – WooCommerce Anti-Fraud & Checkout Verification & Spam Prevention](https://wordpress.org/plugins/wc-blacklist-manager/) * [Frequently Asked Questions](https://wordpress.org/plugins/wc-blacklist-manager/#faq) * [Support Threads](https://wordpress.org/support/plugin/wc-blacklist-manager/) * [Active Topics](https://wordpress.org/support/plugin/wc-blacklist-manager/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wc-blacklist-manager/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wc-blacklist-manager/reviews/) ## Tags * [fatal error](https://wordpress.org/support/topic-tag/fatal-error/) * 1 reply * 2 participants * Last reply from: [B.Ng](https://wordpress.org/support/users/baonguyen0310/) * Last activity: [9 months, 1 week ago](https://wordpress.org/support/topic/call-to-undefined-function-get_real_customer_ip/#post-18558927) * Status: resolved