PHP2Shell, two critical flaws in the PHP engine (CVSS 9.2), was disclosed and patched on October 21, 2026. An exploit attempt was recorded four days before that fix. Official builds exist only for PHP 8.2 and up. Versions 7.4, 8.0 and 8.1 got only unofficial source backports, and older releases got nothing. A PHP API rebuilt in Kotlin stops depending on PHP, with the first release live in 7 days. See the news report.
PHP to Kotlin migration services fit US product teams that already write Kotlin for Android and want one language from phone to server. A PHP API that only one person understands becomes code your mobile developers can read, review and fix.
The new server runs on Ktor, the lightweight JetBrains framework, or on Spring Boot when you need its wide set of integrations. Database work goes through Exposed or jOOQ, JSON through kotlinx.serialization, and slow outside calls run on coroutines so one waiting request does not tie up a thread.
Techno Mantra is an AI and web development company that builds AI applications, websites, SEO programs and custom CRM systems for businesses in the US, Canada and Australia. The Kotlin code stays plain enough for your own developers to own after launch.
What Kotlin gives you over PHP
Kotlin runs on the JVM, so it brings Java's speed and its library catalog with far shorter code. JetBrains builds Kotlin and IntelliJ, so the editor flags mistakes as you type.
Null errors stopped by the compiler
Kotlin marks which values may be empty. Code that skips a null check will not compile, which removes a class of crash PHP only reveals in production.
Shared models with your Android app
Data classes and validation rules can sit in a Kotlin Multiplatform module that the server and the app both use, so API and client stay in step.
Coroutines for slow calls
A worker no longer sits blocked while a payment provider or shipping API replies. Coroutines hold thousands of open calls on a small server.
Scope of a Kotlin back end migration
- PHP endpoints rewritten as Ktor routes or Spring controllers
- Request and response bodies typed as Kotlin data classes
- Queries ported to Exposed or jOOQ, with Flyway for schema changes
- User table and password hashes carried over, so no password resets
- JWT or session auth rebuilt to match your mobile app
- Push notifications, email and third-party API clients
- Kotest or JUnit 5 tests on every ported rule
- Gradle build, Docker image and CI deploy to your host
The 7-day plan for a PHP to Kotlin move
Day 1: Read the PHP
Every endpoint your apps call gets listed with its tables and edge cases, then you approve the week-one scope and a fixed fee.
Days 2-4: Write the Kotlin service
Gradle project, data classes and database layer first, then each endpoint with a test proving it returns what PHP returned.
Days 5-6: Point a test build at it
Your Android or web build talks to the Kotlin API on staging while responses are diffed against PHP and gaps get fixed.
Day 7: Launch
Live traffic moves to Kotlin route by route through your proxy, with error rates watched and PHP kept ready as a fallback.
PHP API vs Kotlin API
What changes once the server your apps call is written in Kotlin.
| PHP API | Kotlin API | |
|---|---|---|
| Null handling | Undefined index notices and null bugs at runtime | Nullable types checked at compile time |
| Concurrency | One process per request | Coroutines handle many waiting calls on few threads |
| Code sharing | Separate models for app and server | Shared Kotlin data classes and validation |
| Tooling | Editor support varies | Full IntelliJ refactoring and inspections |
| Libraries | Composer packages | Kotlin libraries plus Java's Maven Central |
| Team | PHP developers separate from mobile | Android developers can work on the back end |
Why work with us on Kotlin
The team knows both sides of this move: PHP habits that hide bugs and the Kotlin features that catch them.
Your apps keep working on launch day
The API contract is frozen on day one, so the Kotlin server returns the same JSON fields and status codes your released app versions expect.
One fixed price per phase, set after a review of your PHP code.
An NDA comes first, and you receive the repo and all keys at the end.
Kotlin back end migration for US product teams
This work suits startups and app companies in the United States that ship an Android app on top of an aging PHP API. Calls overlap US Eastern hours, and questions get an answer within one business day.
A named lead joins your stand-ups when you need one, and an NDA is signed before any code changes hands. Behind the team: 5,000+ projects delivered for 3,460+ clients.
Official sources: PHP supported versions · Kotlin
Frequently asked questions
Straight answers about our PHP to Kotlin Migration service.
Most small and medium PHP APIs move to Kotlin in 7 days. Large back ends get a phased plan: the busiest endpoints go live on Kotlin inside the first 7 days, and the rest follow in later sprints.
Ktor suits lean APIs that mostly serve a mobile app. Spring Boot suits apps with many integrations, admin tools or enterprise login. The audit of your code settles the choice.
No. URLs, JSON shapes and error codes stay identical, so a user on an old app version sees no change.
Maybe not. If nobody on your side writes Kotlin, a PHP 8.4 upgrade, Laravel or Node.js may be easier to staff, and the audit tells you so directly.
Yes, for each endpoint that runs on Kotlin, since those no longer touch PHP. Any PHP left during a phased move is upgraded to PHP 8.4.27, which carries the fix.
Yes, this service is built for US teams. Meetings are booked to overlap US Eastern hours, and each phase runs at a fixed price with one point of contact.
Is your PHP app still on an old version?
Send the URL or repository, under NDA if needed. The audit checks for the PHP2Shell flaw and outdated code and shows what a 7-day migration looks like.
Request a migration audit