PHP2Shell, the biggest PHP security flaw in years, went public on 21 October 2026. It reaches every PHP version back to PHP 5, and only PHP 8.2 and newer get the official fix. PHP 7.4 is not one of them, so a PHP 7.4 site stays open to it. Don't worry: we'll upgrade your app to a patched PHP 8.4 release in 7 days. See how the PHP update fixes it.
Our PHP 7.4 to PHP 8.4 upgrade services in USA and UK help companies move off a PHP version that stopped getting security fixes in November 2022. Since PHP2Shell went public, staying on 7.4 is no longer a slow risk. It is an open door.
The jump is bigger than it looks. PHP 8.0 changed how strings and numbers compare and made many internal functions throw errors instead of warnings. PHP 8.1 started warning about null passed to built-in functions, 8.2 deprecated dynamic properties, and 8.4 deprecated implicitly nullable parameter types. Code that ran quietly on 7.4 can break in a dozen small ways.
We find every one of those spots, fix them, update your Composer packages and move the site to a patched PHP 8.4 release. Your users see the same site, just faster and safe again.
Why upgrade from PHP 7.4 to PHP 8.4
PHP 8.4 is a supported release that gets security fixes, and it is noticeably faster than 7.4 for most apps.
Security fixes again
PHP 8.4 receives patches, including the October 2026 fix for both PHP2Shell flaws. PHP 7.4 never will.
Faster pages
The PHP 8 engine and its JIT compiler make most apps quicker, which helps both users and search rankings.
Modern code
Enums, readonly properties, match expressions and property hooks make the code shorter and safer to change.
What our PHP 8.4 upgrade covers
- Full scan of your code for PHP 8.0 to 8.4 breaking changes
- Fixes for null, string and number comparison errors
- Dynamic properties moved to declared properties
- Composer packages and libraries updated to PHP 8 versions
- Framework upgrade if needed (Laravel, Symfony, CodeIgniter)
- WordPress plugins and themes checked for PHP 8.4
- Server moved to a patched PHP 8.4 release
- Error logs watched for two weeks after launch
Our 7-day PHP 8.4 upgrade plan
Day 1: Scan
We run static analysis and compatibility checks on your code and list every line that breaks on PHP 8.4.
Days 2-4: Fix
We fix the code, update Composer packages and run the app on PHP 8.4 in a private staging copy.
Days 5-6: Test
We test logins, forms, checkout and reports, compare results with the old site, and you sign off.
Day 7: Switch
We switch your server to PHP 8.4 with no downtime and keep a rollback ready just in case.
PHP 7.4 vs PHP 8.4
What actually changes when your app moves from PHP 7.4 to PHP 8.4.
| PHP 7.4 | PHP 8.4 | |
|---|---|---|
| Security fixes | Ended in November 2022 | Supported, includes the PHP2Shell fix |
| PHP2Shell (October 2026) | No official patch | Fixed in PHP 8.4.27 |
| Speed | Older engine, no JIT | Faster engine with JIT |
| Type safety | Loose, many silent warnings | Union types, enums, stricter errors |
| Language features | Arrow functions, typed properties | Match, named arguments, readonly, property hooks |
| Library support | Many packages have dropped 7.4 | Supported by current packages |
Why choose us for your PHP 8.4 upgrade
Upgrades go wrong when someone flips the PHP version on a live server and hopes. We never do that.
Tested on a copy first
Every fix is made and tested on a private copy of your site, so your live site keeps running until the new one is proven.
Fixed price after a free code scan.
Rollback plan ready on launch day.
PHP upgrade services for USA and UK companies
This service is built for businesses in the United States and the United Kingdom that still run PHP 7.4 on a custom app, an online store or a WordPress site. We work on US Eastern and UK hours and keep you updated every day of the upgrade.
You get a written list of what we changed, so your own developers or your next agency can pick up the code without guessing.
Official sources: PHP supported versions · PHP security releases · PHP 8.4 migration guide
Frequently asked questions
Straight answers about our PHP 7.4 to PHP 8.4 Upgrade service.
Yes. We skip the in-between versions on your server but fix the code for every change made in PHP 8.0, 8.1, 8.2, 8.3 and 8.4, so the app runs cleanly on 8.4.
Yes. The flaws reach every PHP version back to PHP 5, and PHP 7.4 gets no official fix. Moving to a patched PHP 8.4 release is the safe way out.
Most sites are upgraded in 7 days: one day to scan, three days to fix, two days to test and the switch on day seven. Very large codebases get a phased plan.
Most current plugins do. We check every plugin and theme, update the ones that have PHP 8 versions and replace or patch the few that don't.
No. We test everything on a copy of your site and switch the PHP version at a quiet time, with a rollback ready if anything looks wrong.
Yes. We upgrade PHP apps for businesses across the United States and United Kingdom, with a fixed price, an NDA and daily updates on your business hours.
Is your PHP app still on an old version?
Send us the URL or the repository. We check it for the PHP2Shell flaw and old code for free, and tell you what a 7-day migration looks like.
Get a free migration audit