PHP2Shell, two critical PHP flaws (CVSS 9.2), was disclosed and patched on October 21, 2026, after an exploit attempt was recorded four days earlier. Patched releases start at PHP 8.2, unofficial backports stop at 7.4, and PHP 7.0 gets nothing. PHP 8.4 carries the fix, and most small and mid-sized apps reach it in 7 days. Read the guide to updating PHP.
The PHP 7.0 to PHP 8.4 upgrade service moves US apps off PHP 7.0, unsupported since January 10, 2019, onto a patched release. 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.
Many of these apps reached PHP 7 around 2016 as PHP 5 code patched only enough to run, and the deprecation notices they threw then now matter. PHP 4 style constructors, deprecated in 7.0, stop acting as constructors in PHP 8.0. each() and create_function(), deprecated in 7.2, are gone in 8.0. mcrypt left the core in 7.2, and calling a function with too few arguments has thrown an Error since 7.1.
All of it gets repaired on a staging copy, Composer packages move to versions that support PHP 8, and the same app launches on a patched PHP 8.4 release.
Reasons to leave PHP 7.0 now
Staying put costs more each month: no patches, fewer hosts willing to run it and fewer libraries that still install on it.
A patch for PHP2Shell
PHP 8.4.27 includes the fix for both CVE-2026-109618 and CVE-2026-109619. No such release exists for 7.0, and none will.
Current packages install again
Most Composer libraries dropped PHP 7.0 years ago. On 8.4 you get today's versions of payment SDKs, mailers and PDF tools, with their own security fixes.
Room to build
Named arguments, enums, match expressions and readonly properties make new features cleaner and cut the bugs your team spends time chasing.
Inside the PHP 7.0 to 8.4 upgrade
- Scan for every PHP 7.1 to 8.4 breaking change in your code
- PHP 4 style constructors converted to __construct
- each() and create_function() replaced with foreach and closures
- mcrypt code moved to OpenSSL or sodium
- count() calls on non-countable values fixed
- Curly brace string offsets and unbracketed nested ternaries rewritten
- Composer lock file rebuilt on PHP 8 compatible packages
- Live server switched to a patched PHP 8.4 build
The 7-day plan for a PHP 7.0 app
Day 1: Find the breaks
PHPStan and PHPCompatibility list each file and line that fails on 8.4, and that list becomes your fixed quote.
Days 2-4: Repair
Constructors, removed functions, encryption and package updates are fixed on a private copy running PHP 8.4.
Days 5-6: Check
Logins, forms, emails, uploads and admin screens are tested side by side with the 7.0 copy, then you review them yourself.
Day 7: Launch
The live server moves to PHP 8.4 in a low-traffic window, with the old setup kept ready for a fast rollback.
PHP 7.0 vs PHP 8.4 at a glance
How the two releases differ for a site that has to stay online and safe.
| PHP 7.0 | PHP 8.4 | |
|---|---|---|
| Last security fix | January 10, 2019 | Fixes until December 31, 2028 |
| PHP2Shell | None | Patched in 8.4.27 |
| Constructors | PHP 4 style still works with a warning | Only __construct counts |
| Types | Scalar and return types, no nullables | Nullable, union, intersection and DNF types |
| Encryption | mcrypt still bundled | OpenSSL and sodium built in |
| Package support | Dropped by most libraries | Targeted by current releases |
Why work with us on PHP 7.0
Half-migrated PHP 5 code breaks in predictable places, and running the 7.0 and 8.4 copies against each other catches each one.
Nothing changes for your users
URLs, screens and data stay as they are. The PHP version underneath changes, along with any bugs found on the way.
Written change log you can give to any future developer.
Fixed price, set after the audit of your code.
Upgrading PHP 7.0 apps for US companies
This service is meant for US firms running a PHP 7.0 portal, store or internal tool that nobody has upgraded since it was first moved off PHP 5. Working hours overlap with US Eastern time, and you get a reply to every message within one business day.
One project manager runs the job, an NDA is signed on request and the quoted price holds, with 5,000+ projects delivered behind the team.
Official sources: PHP supported versions · PHP security releases · PHP 8.4 migration guide
Frequently asked questions
Straight answers about our PHP 7.0 to PHP 8.4 Upgrade service.
Seven days, scan to launch, for most small and mid-sized apps. Large codebases get a phased plan, with the first section live on PHP 8.4 inside those 7 days and the remaining parts released after it.
Yes, and nothing patches 7.0 itself. PHP 8.2 through 8.5 received official fixes, and the unofficial backports reach no further back than 7.4. Upgrading to 8.4.27 or later solves it.
PHP 8.0 removed functions that 7.x only warned about, stopped treating PHP 4 style methods as constructors, changed string to number comparison and turned many warnings into TypeErrors. Each of those needs a small code change.
It is a poor place to stop. PHP 7.4 lost security support in November 2022, and its only PHP2Shell fix is an unofficial source backport. PHP 8.4 gets official fixes through 2028.
No. Only the code behind the design changes, so visitors see the same site.
Yes. Businesses across the USA get the same terms: an NDA on request, a fixed price and calls that overlap US Eastern hours.
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