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Update PHP first to a version that's compatible with BOTH the existing and the new version to be installed. Make sure the existing system health page reports everything is OK. Then try updating WHMCS. Once update is successful, and you have a working WHMCS, you can attempt to update PHP again to the latest supported version, for whatever version of WHMCS you are upgrading to.

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I actually have the same question because I’m trying to upgrade WHMCS from 8.3 to the latest version while also moving to a newer PHP version, and I’m running into very similar errors. During the upgrade process, I keep seeing messages about missing crons directories, issues with the Composer post-update-cmd hook, and fallback errors with unzip and ZipArchive. Even after verifying permissions and cleaning caches, the process doesn’t complete smoothly, and it’s unclear whether the errors are due to file naming issues, PHP configuration, or missing system functions like proc_open. I’m also trying to figure out the best approach to resolve this without breaking the existing installation. It seems like ensuring the correct PHP extensions are enabled, checking file system case sensitivity, and confirming directory paths might help, but there isn’t a clear step-by-step guide for this scenario. If anyone has successfully upgraded WHMCS under similar conditions and can share the exact sequence of steps, it would be really useful because I’m dealing with the same errors and want to make sure the upgrade finishes correctly.

Magento mis-spelled

Hello, no special steps to take to migrate your WHMCS from one server to another. All information will be migrated as long as the database is migrated. Simply update the configuration.php with the new WHMCS license key once migrated and ensure your database connection is correct.

You'll want to install the template at /whmcs/templates/zionhost and then update the template in General settings.

Hello everyone, The **Server Monitor** module is now available on the WHMCS Marketplace and I'm currently looking for **10 beta testers** to help improve the monitoring features and suggest additional functionality. The goal is not just to test the module, but to collect **real feedback from hosting providers and system administrators** about what could make server monitoring inside WHMCS more useful and efficient. ## About Server Monitor Server Monitor is a WHMCS module designed to give hosting providers a quick overview of their infrastructure directly from the WHMCS admin panel. It allows you to: • monitor server load • check the status of critical services • quickly identify potential issues • restart services such as Apache or MySQL directly from WHMCS • receive push notifications through the Server Monitor mobile app ## What I'm looking for I'm looking for testers who: • actively use WHMCS in a real hosting environment • are willing to test the module in production or staging • can provide **public feedback and suggestions** in this thread The goal is to understand what additional monitoring features hosting providers would like to see. ## What testers receive To thank testers for their time and feedback, I will provide **free access to two other WHMCS modules**: • Trial Services • Ticket Priority ## Small request If you participate in the beta testing, I kindly ask you to: • leave **public feedback in this thread** • give the module a **like on the WHMCS Marketplace page** Your feedback will directly influence the next updates of the module. ## Join the beta If you're interested in participating, simply reply to this thread or send me a private message. I will select the first **10 testers** and provide instructions.

see that link of the ordered whmcs temlpate from web: https://fluentthemes.com/wp/zionhost/whmcs/index.php?systpl=zionhost no i want that template design and model, but i need to link that to the whmcs system, how to do?

same problem for me now after upgrading for 9.01 website not chaging language

Hello WHMCS Community, I’d like to showcase ElnHost, ElnHost offers high speed Web hosting and WordPress hosting for your websites. Powered by WHMCS. Main Website - https://www.elnhost.com WHMCS Website - https://www.elnhost.com/index.php Tried to do few changes on the default theme "Twenty-One". 1. Top menu for main website access. 2. Added Currency selector beside Cart (If user is not logged-in) 3. Replaced breadcrumb on home page with a banner. 4. Resized Domain search section with some graphics. 5. Showed plans on home page. 6. Changed the look of default section "How Can We Help Today" and "Your Account". 7. Footer look also changed. 8. Breadcrumb look change (Can be seen by clicking any link - Store, Announcement, Knowledge base and so on). 9. Store page look change - fonts, color, buttons. 10. On shopping cart page where "Choose a Domain..." fonts color change. 11. On shopping cart "Configure" page buttons color change with a additional note "Promo will be applied on next page". 12. On "Review & Checkout" page Promo code applies automatically if selection is not Monthly. Promo code also gets updated/changed with selection change from Quarterly to Triennially. 13. For logged-in users client area look is also changed. Feedback and suggestions from the WHMCS community are always welcome. Thank you for carving out time

Hi I have moved to new hosting company. I have many company and their information registered with my WHMCS. I am moving to my new hosting. How I can migrate from old WHMCS to new one and move all information from old WHMCS to new WHMCS? Any quick help?

Hi everyone, If you are still looking for a solid BLIK and Przelewy24 integration, we have developed a dedicated Przelewy24 module for WHMCS that might be exactly what you need. One of its standout features is the full "BLIK Level 0" integration. This means your customers can type their 6-digit BLIK code directly within the WHMCS shopping cart checkout, or right on the invoice page – completely eliminating the need for external redirects. You can check out all the features and get the module here: 👉 https://panel.arenadomen.pl/przelewy24-whmcs.php You can also find us on the WHMCS Marketplace: 👉https://marketplace.whmcs.com/product/6645-przelewy24-payment-module Let me know if you have any questions!

Hello, I can create a hook for you, but can you give me the URL you are getting when getting this error? The url might be something like https://yourdomain.com/cart.php?a=checkout&paypal_error=CARD_TYPE_NOT_SUPPORTED&debug_id=f7102346dddd8 I just need that to prepare a hook for you.

Hi all, I have an uptime monitoring platform StatusEagle (https://statuseagle.com) and planning to develop support for WHMCS monitoring in to this. Before implementing it, I’d appreciate some feedback from operators running WHMCS in production. Specifically: 1) Do you run multiple WHMCS instances across brands? 2) Would monitoring cron execution (last run, duration, failures) via external alerting be useful? 3) Are business-level alerts (no new orders, gateway failures, module errors) something you currently monitor? 4) Is there any recurring WHMCS issue that external monitoring could help detect early? Goal is to build a centralized monitoring platform, that can easily show health of your WHMCS in a centralized dashbaord. If you have multiple WHMCS installations, all WHMCS health will be available in a single place. Appreciate any input.

add this line to your configuration.php it will go back to normal behavior $allow_adminarea_invoice_mutation = true;

What is SAC? It will help to get an answer here if you provide as much (even it seems obvious) detail to your question.

Thank you for the terrible WHMCS support. This is now the tenth client who has made a bulk payment and the late fee is simply not added to the invoice, and none of the outstanding invoices are automatically marked as paid. I’m not even going to mention the credit and debit issues anymore, because it seems the WHMCS developers themselves don’t even know what they’re doing. Does anyone have a suggestion for another system similar to this garbage?

Hi everyone, I’ve been working on a small WHMCS payment gateway module for crypto payments and would appreciate some early feedback before publishing it more widely. The gateway is non-custodial. Payments go directly from the customer wallet to the merchant wallet, and the platform only provides payment monitoring and webhook notifications. It supports normal one-time payments as well as subscription billing. For subscriptions the customer approves a smart contract once and recurring payments are executed automatically according to the billing schedule. I’ve put the module and installation instructions here: https://gitlab.com/alentev/zyrox-whmcs-gateway At this stage I’m mainly looking for people willing to test it in a dev or staging WHMCS installation and share feedback if something does not work as expected. Happy to help with integration or debugging if anyone wants to try it. Thank you

I would also like to note that when a client cancels a service and later requests that the cancellation be revoked so they can continue using the service, the system prevents them from making payment due to the credit note being applied. The invoice becomes closed and locked, which prevents the client from paying for the service. Unfortunately, this behavior appears to be a result of the recent update. In our experience, the change has created several operational issues and does not appear to have been fully tested prior to release.

Hello, I have enabled “Check to allow Upgrading/Downgrading of configurable options” under the product settings in WHMCS. Scenario: Configurable Option: Extra IPv4 Price: $2 per month Client has 15 days remaining in their billing cycle Currently, when the client upgrades and adds 1 Extra IPv4, WHMCS correctly calculates the prorated amount as $1 (half month). However, I would like prorata calculation to apply only when upgrading/downgrading the main product/plan, and NOT when upgrading configurable options. Is there any built-in way to achieve this? If not, can this be done via a custom hook or override? Any guidance would be appreciated. Thank you.

good points! I don't know, hopefully someone from whmcs will step in with clarifications

Thank you for the clarification and the documentation link. I understand that this is now intended behaviour and that the recommended workflow is to create a Draft Invoice, make changes, and then publish it. However, we have a few practical workflow concerns and would appreciate guidance. Linking New Invoice to Existing Service If we cancel an unpaid invoice and manually create a new one, the newly created invoice is not automatically linked to the original service. It becomes a separate invoice not associated with that service’s billing cycle. For example: A service invoice is generated with a late fee. The customer requests removal of the late fee. Now we must cancel the original invoice. If we create a new invoice manually without the late fee, it does not remain properly connected to the service renewal. Is there a supported way to create a replacement invoice that remains linked to the existing service and billing cycle? If the new Draft Invoice workflow allows proper tagging or association with the existing service, that would solve our concern. Editing Invoice Line Items for Adjustments Earlier, we could edit the invoice line item description and adjust the amount. For example: Mention “Special pricing adjustment for this month” Reduce invoice amount by half Keep everything within the same invoice record Now that unpaid invoices cannot be edited, this flexibility is gone. The only option appears to be cancellation and re-creation, which breaks continuity and increases administrative overhead. Is there a recommended best practice for handling such partial adjustments while keeping service linkage intact? Partial Usage / Refund Scenarios Another scenario: A customer pays via direct transfer. We add funds manually and deploy the service. After 20 days, the customer requests a refund for the remaining 10 days. We process a partial refund externally. If we want to: Calculate usage Deduct our effort or processing charges Clearly document the breakdown in an invoice format How should this be handled under the new workflow? Is it possible to generate an adjustment invoice or credit note that clearly reflects these calculations and keeps accounting clean? We fully understand the intent behind protecting invoice integrity, especially for compliance and audit reasons. Our main concern is maintaining service linkage, transparency, and clean billing history while still handling real-world adjustments. Appreciate any clarification on best practices under 9.0.1. Thank you.

It's an intended behaviour, explained here: https://docs.whmcs.com/9-0/billing-and-invoicing/invoice-management/

Wish I'd thought of that. 😉

i had to pass this onto my host as i dont have server access and they sent me this along with updated cron command 'Upon checking from our end the problem was occurring because the cron was running with the system PHP binary, which caused ionCube to be loaded more than once. This leads to the error emails you were receiving.'