PHP & ASP.NET Core · Udupi & Mangaluru
We write the part of business software that runs on the server, in PHP 8 or ASP.NET Core: the data, the rules and the logins. We also take over code others wrote. Our studio is in Udupi, and whoever writes your code keeps it updated.
In short
A PHP or ASP.NET Core developer writes the back end of a website or business system: the code on the server that stores the data, checks each login, applies the business rules and passes data to apps and other software. From its studio in Udupi, coastal Karnataka, Whirl Designs writes this code in PHP 8 and ASP.NET Core, and takes over and upgrades code other developers left behind.
Start here
The language matters less than whether someone can look after the code for years. These are the three answers we give most often, starting with the simplest.
Best for: A working system on an old version
Best for: Business systems on ordinary Linux hosting
Best for: Offices that already run Microsoft servers and tools
If your current code works and can be upgraded, we will tell you to keep it. Changing the language is rarely the fix for old code.
Our work
ERP Sutra
Software products · Karnataka
ERP Sutra is our own product arm. Under its industry ERPs sits one shared platform layer, written in PHP 8 on MariaDB, that does the jobs every business system needs: sign-in, roles, an audit trail and backups. Those were solved once, in one place, instead of again in every product.
The products on top are live with paying users. Facet is for diamond and jewellery manufacturing, and Rebar is for reinforcement-steel contractors, from bar bending schedules to weekly labour runs. Every product runs on plain shared PHP hosting, not on a group of dedicated servers, and bringing it back from a backup has been practised for real, not taken on trust.
Also built by us
What you get
Whether we build it or take it over, each back end gets these six, and the plan lists them before any code changes.
How it runs
The first two steps depend on whether we start fresh or take over your code. After that, every job runs the same way.
For a system you already run, we read the code and the database before promising anything. For a new one, every rule, screen and connection is written down with you.
Language, framework, hosting, versions and the order of work, on paper. For inherited code it also says what to keep, what to fix and what to replace.
All work happens on a separate copy with its own database. The live system is backed up first, and that backup is restored once to prove it works.
Changes reach the copy every week or two. You try them on real work, the tests run, and only then does a release go live.
Each release goes out when few people are using the system, with a fresh backup just before and the previous version ready to put back.
The people who wrote the code handle security fixes, small changes and each upgrade before a version's support ends, so no work waits while someone new studies how it is built.
Not a fit
Questions
Neither is better in general; the right one depends on your hosting and on who will look after the code. PHP 8 runs on almost any hosting, and many developers know it. ASP.NET Core suits offices that already run Windows servers, SQL Server or a .NET team. We recommend one in writing, with the reason, before any work starts.
Yes, for most business websites and systems. PHP 8.4 and 8.5 are current versions with years of security fixes ahead, and PHP also runs WordPress and a large share of the web, so hosting and developers are easy to find. Most of our own work is PHP 8 with MariaDB or MySQL. Every project on our work page runs on PHP; none of them is in ASP.NET Core yet.
No. ASP.NET Core is the newer, rewritten version that runs on current .NET, on Windows or Linux. The older ASP.NET, which includes Web Forms, runs only on .NET Framework on Windows. It still gets security fixes with Windows but no new features. Web Forms pages cannot move across as they are, so they are rebuilt, often as Razor Pages (ASP.NET Core's own way of making pages), a few at a time while the old site keeps running.
Yes, and soon. PHP 8.1 stopped getting security fixes at the end of 2025, PHP 8.2 stops at the end of 2026, and PHP 7 stopped in 2022. Microsoft ends .NET 8 support on 10 November 2026, while .NET 10 is supported until November 2028. A new security hole in an old version stays open for good. We upgrade on a copy first, fix whatever the newer version rejects, and switch only when the tests pass.
It depends on whether the work is new or an upgrade. For a new back end, the first piece your staff can use usually takes four to eight weeks, and the rest follows in stages. Moving an existing system to a supported version often takes two to six weeks, most of it testing. With inherited code, we first spend a week or two reading it and writing up what we find.
Yes. We start by reading the code and the database, running it on a copy, and writing down what is sound, what is risky and what is missing, such as tests or notes. You get that in writing before we change anything. If the code is too tangled to keep, the note says so plainly.
If it is PHP, almost certainly. PHP runs on ordinary shared hosting, which is where our own ERP Sutra products run. ASP.NET Core needs a host that supports it, such as a Windows server with IIS or a Linux server you control, and most shared Linux plans cannot run it. We check your hosting before we choose the language.
Yes. A system is easier to go through side by side, so we come to offices in Mangaluru, Manipal, Karkala, Kundapura and Udupi itself, or you can sit with us at our Udupi studio. For a first look at existing code, read-only access is enough, and we can sign a non-disclosure agreement before we see it. Teams elsewhere in India work with us remotely.
Worth reading first
Clean, documented, tested code on a modern, proven stack — the foundation that keeps your php & asp.net core fast and dependable for years.
Ready when you are
Tell us what you run today, or what you want built. You get a written plan in return that names the language, the hosting, the versions and which part comes first.