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I tried to enter a quantity of 1003 for a billable item and it was changed to 999.99 - no error or alert, just when I went back that's what it saved as. Any way to increase this?

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It's unfortunate that they are still not fixed it If you are affected, You should be able to handle this with a hook till they come up with a permanent solution. I had done some hook for upgrade handling in the past, so it should be possible.

I have reported the following on 19th Feb 2026 : == Affected Version == WHMCS 9.0.1 == Description == When a client attempts to upgrade an existing yearly/recurring service to a one-time (lifetime) service, WHMCS throws a fatal DivisionByZeroError in includes/upgradefunctions.php inside SumUpPackageUpgradeOrder(). This happens on the latest WHMCS version running on PHP 8.3 and occurs even with all custom hooks/modules disabled, indicating a core issue. This was working fine with PHP 7.4 ex : Error: DivisionByZeroError: Division by zero in public_html/includes/upgradefunctions.php:0 Stack trace: #0 public_html/upgrade.php(0): SumUpPackageUpgradeOrder('9043', 10, 'monthly', '') #1 {main} == Steps to Reproduce == Use the latest WHMCS version on PHP 8.3. Create a recurring product (e.g., yearly billing cycle). Create a second product with pay type “One Time”. Set up an upgrade path from the yearly product to the one-time product. Log in as a client with the yearly service. Go to Client Area ? Upgrade/Downgrade and attempt to upgrade to the one-time product. The upgrade page fails with a fatal error. == Expected Result == The upgrade page should load normally == PHP Version == 8.3 == Severity == High This was confirmed to be a bug [ case WHMCS-25204 ]. Since then, two minor versions (WHMCS v9.0.2 & v9.0.3) were released, and this is not fixed yet!

Hello, Which WHMCS and php version are you using. I tested the above on version 8.13 and 9. 1 works okay on both for me.

I think this is available 9.0.3. I don't see this on 9.0.0

Is this available on 8.13.x and 9.x or only 9.x?

It's curious how WHMcs can keep getting worse with updates like this.

Thank you for the reply @WHMCS John and for getting back to me about the credit note issue. Just a bit of feedback, for me personally ( our accounts dept are happy to do the add payment) if would be a lot easier if you could tick a set of invoices and mark them paid - it would then show them paid with the method stated on them (eg bank, cheque etc) rather than having to go into say 80 invoices individually to add a payment to each one

Rad web hosting announces release of client-facing whmcs whois addon module! Rad Web Hosting is pleased to announce the release of client-facing WHMCS WHOIS addon module. Rad Web Hosting Announces Release of Client-Facing WHMCS WHOIS Addon Module Rad Web Hosting is pleased to announce the release of its new client-facing WHMCS WHOIS Addon Module, a powerful and flexible extension designed to provide a secure, public-facing WHOIS lookup interface for WHMCS installations. This module enables hosting providers, domain registrars, and infrastructure operators to offer fast and reliable domain WHOIS queries directly from their WHMCS platform. The module was developed to address a common need among hosting providers: offering a public WHOIS lookup tool that integrates seamlessly with WHMCS while maintaining performance, security, and administrative control. With built-in caching, CAPTCHA protection, customizable WHOIS servers, and strict domain validation, the WHMCS WHOIS Addon Module delivers a modern and abuse-resistant solution for domain lookup services. A Modern WHOIS Lookup Tool for WHMCS The new addon introduces a clean and efficient WHOIS lookup interface that can be accessed by both clients and public visitors. Hosting providers can easily add a WHOIS lookup page to their WHMCS deployment, allowing users to query domain registration information without requiring login access. Visitors can simply enter a domain in the standard format: example.com The module then performs a WHOIS query and returns the registry response directly within the WHMCS interface. The public lookup page is accessible via: https://yourdomain.com/index.php?m=client_whois This makes it easy for providers to link the tool from their homepage, domain search pages, knowledge base, or marketing landing pages. Designed for Security and Abuse Prevention Public WHOIS services can easily become targets for automated abuse. To prevent this, the Rad Web Hosting WHOIS Addon Module includes several built-in safeguards. Anonymous users are required to complete a CAPTCHA verification using WHMCS’s built-in CAPTCHA framework before performing a lookup. This allows the module to automatically support whichever CAPTCHA provider is configured within WHMCS, including: Google reCAPTCHA hCaptcha Cloudflare Turnstile WHMCS built-in CAPTCHA Logged-in clients are exempt from CAPTCHA, allowing for a smooth user experience while maintaining protection against automated queries. In addition, the module enforces strict domain validation rules, ensuring that only properly formatted domain names can be submitted. Intelligent WHOIS Server Resolution Different domain extensions use different WHOIS servers, and managing these differences can be complex. The Rad Web Hosting module solves this by implementing a flexible multi-layer WHOIS resolution system. When a lookup is performed, the module resolves the correct WHOIS server using the following priority: Administrator-defined WHOIS server overrides Built-in WHOIS server mappings Automatic IANA referral lookup This approach ensures compatibility across a wide range of domain registries while allowing administrators to customize WHOIS servers for specific TLDs when necessary. Through the module’s admin interface, operators can easily add, edit, or disable WHOIS servers for individual domain extensions. Built-In WHOIS Caching for Performance To ensure fast response times and reduce unnecessary network requests, the module includes a built-in filesystem caching system. When a WHOIS query is performed, the response is stored locally and reused for subsequent requests during the configured cache lifetime. This significantly reduces outbound WHOIS traffic while improving lookup speeds for frequently queried domains. Typical performance improvements include: Scenario Response Time Cached lookup Under 10 milliseconds Fresh WHOIS query 200–900 milliseconds By caching responses, the module also helps protect upstream WHOIS servers from excessive requests. Flexible TLD Validation The addon allows administrators to define which domain extensions are accepted by the lookup tool. This configuration is maintained in a separate file, making it easy to update without modifying the core module code. Administrators can also choose to allow any TLD if they prefer not to enforce a strict validation list. This flexibility makes the module suitable for environments ranging from small hosting providers to large-scale domain marketplaces. Seamless WHMCS Integration One of the key goals of the project was to ensure that the module integrates naturally with WHMCS. The addon follows WHMCS development best practices and relies on native platform functionality wherever possible. See also How to Install WHMCS Domain Reseller API Registrar Module Key integration features include: Native WHMCS CAPTCHA support WHMCS addon module architecture WHMCS database integration for server management Smarty-based client area templates Compatibility with WHMCS security and configuration settings This ensures that the module behaves like a natural extension of the WHMCS platform rather than a standalone add-on. Easy Installation and Deployment Deploying the module takes only a few minutes. Administrators simply upload the module directory to the WHMCS addons folder and activate it through the WHMCS admin panel. Once activated, the module automatically creates its required database tables and becomes immediately available. The lookup page can then be accessed through the WHMCS routing system and linked anywhere on the provider’s website. Ideal for Hosting Providers and Domain Services The WHMCS WHOIS Addon Module is especially useful for: Web hosting providers Domain registrars Domain marketplaces Infrastructure platforms SaaS providers managing domain portfolios By offering a built-in WHOIS lookup tool, providers can give visitors quick access to domain registration data while keeping the entire experience within their own platform. Continuing Innovation from Rad Web Hosting The release of the WHMCS WHOIS Addon Module reflects Rad Web Hosting’s ongoing commitment to building practical tools for the hosting and infrastructure community. Rad Web Hosting has long focused on delivering solutions that combine performance, security, and operational simplicity, and this module continues that tradition by providing a production-ready WHOIS lookup system designed specifically for WHMCS environments. Future enhancements may include additional performance improvements, advanced caching options, and expanded domain intelligence features. Availability The Rad Web Hosting client-facing WHMCS WHOIS Addon Module is available now. Github: https://github.com/Rad-Web-Hosting/client_whois WHMCS Marketplace: https://marketplace.whmcs.com/product/8495-client-whois-lookup For more information about Rad Web Hosting services and tools, visit: https://radwebhosting.com Find us on whmcs marketplace

v4.64.18 (Mar 31, 2026) Bug Fix WCU-26 - Issue with perl binary with the latest CSF Cpanel version

Ciao, Qualcuno di voi è riuscito a risolvere i problemi di incompatibilità di Billing Extension con WHMCS 9.X? Dalle ricerche effettuate e dal tipo di errori riscontrati sembra essere un incompatibilità con l'aggiornamento degli Smarty Tag apportato da WHMCS 9, qualcuno di voi è riuscito a risolvere? Siamo un bel pò nei casini e Katamaze non risponde al supporto sul loro sito.

Every checkout has a moment when a customer hesitates. Maybe the payment method they expect isn't available. Maybe the form asks for too many fields. Maybe it's a repeat purchase that still feels like filling out a first-time checkout. Small moments of friction like these can cause customers to abandon payments before completing them. That's why we're introducing Stripe Dynamic Payments for WHMCS. Stripe Dynamic Payments brings Stripe's latest checkout technology directly into WHMCS,...View the full blog post

I updated my WHMCS to 9.0.2 and I get this error when I login to WHMCS admin dashboard. How to fix that? Oops! Something went wrong and we couldn't process your request. Please go back to the previous page and try again. For additional assistance, please reference the WHMCS TroubleShooting Guide » TypeError: Unsupported operand types: int + string in /home/exampleuser/example.com/modules/widgets/Automation.php:56 Stack trace: #0 /home/exampleuser/example.com/vendor/whmcs/whmcs-foundation/lib/Module/AbstractWidget.php(0): WHMCS\Module\Widget\Automation->generateOutput() #1 /home/exampleuser/whmcsdata/templates_c/example_file_homepage.tpl.php(151): WHMCS\Module\AbstractWidget->render() #2 /home/exampleuser/example.com/vendor/smarty/smarty/libs/sysplugins/smarty_template_resource_base.php(123): content_xxx() #3 /home/exampleuser/example.com/vendor/smarty/smarty/libs/sysplugins/smarty_template_compiled.php(114): Smarty_Template_Resource_Base->getRenderedTemplateCode() #4 /home/exampleuser/example.com/vendor/smarty/smarty/libs/sysplugins/smarty_internal_template.php(217): Smarty_Template_Compiled->render() #5 /home/exampleuser/example.com/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templatebase.php(238): Smarty_Internal_Template->render() #6 /home/exampleuser/example.com/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templatebase.php(116): Smarty_Internal_TemplateBase->_execute() #7 /home/exampleuser/example.com/vendor/whmcs/whmcs-foundation/lib/Smarty.php(0): Smarty_Internal_TemplateBase->fetch() #8 /home/exampleuser/example.com/vendor/whmcs/whmcs-foundation/lib/Admin.php(0): WHMCS\Smarty->fetch() #9 /home/exampleuser/example.com/vendor/whmcs/whmcs-foundation/lib/Admin.php(0): WHMCS\Admin->output() #10 /home/exampleuser/example.com/vendor/whmcs/whmcs-foundation/lib/Admin/Controller/HomepageController.php(0): WHMCS\Admin->display() #11 [internal function]: WHMCS\Admin\Controller\HomepageController->index() #12 /home/exampleuser/example.com/vendor/middlewares/utils/src/CallableHandler.php(68): call_user_func_array() #13 /home/exampleuser/example.com/vendor/middlewares/utils/src/CallableHandler.php(38): Middlewares\Utils\CallableHandler->execute() #14 /home/exampleuser/example.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Adapters/PsrRouterStack.php(0): Middlewares\Utils\CallableHandler->handle() #15 /home/exampleuser/example.com/vendor/whmcs/whmcs-foundation/lib/Route/Middleware/Adapters/PsrRouterStack.php(0): WHMCS\Route\Middleware\Adapters\PsrRouterStack->executeHandler() ... #140 {main}

We have officially launched the Smart eKYC Module for WHMCS, a comprehensive identity verification solution built specifically for hosting providers, domain resellers, and SaaS businesses. This module enforces KYC before service activation, ensuring that only verified customers can access your services. It helps create a secure, compliant, and well-managed hosting environment. Key Benefits: Prevent fake registrations and fraudulent orders Protect your servers & domain registration from abuse, spam, and blacklisting Reduce chargebacks and financial losses Automate customer onboarding with smart workflows Automatic suspension or termination of services and client account if KYC is not completed within a defined timeframe The module also offers seamless DigiLocker integration for Indian users and flexible manual KYC options for global customers, making it suitable for businesses serving a worldwide audience. With automated notifications, reminders, and complete admin control, you can significantly improve operational efficiency while maintaining a smooth customer experience. Strengthen your platform security and streamline onboarding with Smart eKYC. Now available for your WHMCS environment. Get the Smart eKYC Module - Buy Now

Buongiorno Federico, ci sono novità in tal senso ? Grazie mille e buona giornata...

Hi everyone, I am hoping to get some genuine advice from people who have actually achieved this properly. We use WHMCS for domain and hosting services, but one of the biggest frustrations for our business is the customer journey between our front-facing website and the WHMCS portal. At the moment, a user visits our main website, searches for a domain name, and is then pushed across to the portal page. The problem is that once they land there, the look, feel, navigation, and overall experience changes quite noticeably. It feels disconnected from the main website, looks clunky, and makes the journey harder for the customer. It also makes it harder for them to navigate back to the main site. What I am trying to achieve is a much more seamless experience where: the domain search results can appear on the front-facing website the store experience remains on the main website as much as possible the WHMCS functionality still powers the backend the design and navigation feel consistent throughout the customer does not feel like they are being pushed into a separate portal environment I have had multiple developers tell me they can achieve this, and I have engaged people on that basis, but I still feel like we have not ended up with the clean, seamless result we are aiming for. This issue is becoming more important because we want to invest further into digital advertising and customer acquisition, but I do not feel confident driving paid traffic into a journey that still feels clunky and disconnected. If the flow is not smooth, it feels like we are making conversion harder than it needs to be. What I would really like to understand is: Has anyone here successfully integrated WHMCS into their main website in a way that feels genuinely seamless? Are you using the WHMCS API to pull domain search and product data into a custom front end? Did you build a custom storefront and then pass customers into WHMCS only at a later stage of checkout or account creation? Are there best-practice approaches for keeping WHMCS in the background while preserving a polished front-end experience? If you have done this successfully, are there examples you are willing to share? I would especially appreciate hearing from businesses or developers who have actually done this in the real world, rather than just theoretical answers. Even a brief outline of your architecture or approach would be incredibly helpful. At this point I am trying to work out: what is realistically possible what approach is considered best practice and how to avoid continuing to spend money on solutions that do not fully solve the problem This is our domain page: https://rocketlauncherweb.com/domain/ - If you search for a domain we then land up here: https://portal.rocketlauncherweb.com/cart.php?a=add&domain=register The developers have finally made it look more like our website but it is still terrible and now you cannot get back to the main site. I really hate it. Any guidance, examples, lessons learned, or recommendations would be greatly appreciated. Thanks in advance. Justin

Thanks for the replay, but as I stated, the UserLogout hook with the header change does not work. I tested your version, but it gets the same result as all the other variations I tried - it just directs me to the index page after logout.

<?php if (!defined('WHMCS')) { die('This file cannot be accessed directly'); } add_hook('UserLogout', 1, function () { header('Location: login.php'); exit; });

Hello, When I choose screen size 1280x720 in computer site look cool but when I choose 1024x768 it's look like as mobile view in desktop also but I want when I choose 1024x768 it will be look like same as 1280x720 same not like mobile in desktop so how can I do. Just in simple I want my site view in desktop 1024x768. Not like mobile

Terrible update. Already had them take away our lifetime licence and now telling us what we can and can't do to our invoices. There were those of us that wanted credit notes to make us compliant for years on WHMCS and had to do work arounds for the clients that requested them but this seems to have gone way too OTT the other way. Are we now going to be forced to follow super strict measures? If you generate an invoice and don't email it to anyone but get the date wrong will you then not be able to edit it? Won't be able to delete it, will have to generate a credit note instead? Is that what this is saying? Having to add a config workaround is annoying but is working at least for now but if they also remove that going to be done with WHMCS.

I am using the same hook <?php add_hook('UserLogout', 1, function($vars) { header('Location: https://different.domain.com'); exit; }); in v9, but it does not work. I also tried with an internal redirect (header('Location: clientarea.php');). Did anything change about how this works in v9? No matter what I do here, I always get redirected to the index.php.

Yep

So you want a hook that will send email to the user when he is logged in?

Part 1: The "Feature Priority" Questions Before talking about money, get them to rank what they actually need. "If you could only pick THREE, which features would make you switch from your current spreadsheet or third-party CRM to an internal WHMCS module?" [ ] Lead/Prospect management (separate from clients) [ ] Visual Kanban Sales Pipeline [ ] Staff @mentions and internal collaboration notes [ ] Automated Follow-up/Drip emails for "Abandoned Carts" [ ] WhatsApp/SMS integration for lead alerts "What is the biggest 'workflow killer' in WHMCS today that this module should fix?" Part 2: The "Pricing Strategy" Questions This is where you gauge their budget. Be direct but offer options. "How would you prefer to pay for a high-quality CRM Addon?" One-Time License: Pay once (e.g., $150 - $300) with 6 months of updates. Monthly Subscription: Low entry cost (e.g., $10 - $20/mo) with ongoing support. Annual Plan: A discounted yearly rate (e.g., $100 - $180/year). "WHMCS has moved to client-based pricing. Should a CRM module do the same, or should it be a Flat Fee regardless of how many leads you have?" "What is the 'Sweet Spot' price for a module like this?" Option A: $49 (Basic: Leads & Notes) Option B: $99 (Pro: Pipeline & Automations) Option C: $199+ (Enterprise: Multi-staff, API, Marketing Tools) Part 3: The "Competitive Comparison" Question "Market leaders like ModulesGarden charge ~$350 for a lifetime CRM license or ~$35/month for a bundle. To win your business, does our module need to be cheaper than them, or just easier to use? Visit Our Portfolio - Click Here