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I will fix wordpress critical error after php upgrade, make plugins php 8 ready
Shuvo Kumar
About this gig
Did your host upgrade PHP, and now your site says "There has been a critical error on this website"? You're not alone. In January 2026, about 47% of WordPress sites still ran PHP versions that no longer get security updates, and PHP 8.2 loses security support on December 31, 2026. Hosts are moving sites to PHP 8.3 and 8.4, and old plugins, themes and custom code break.
I'm a WordPress plugin developer. I fix the code itself, so you can run a modern, secure PHP version instead of switching back to an old one.
What I do:
- Fix fatal errors, white screens and a broken admin
- Scan the whole site for PHP 8.3 and 8.4 problems
- Repair old custom plugins and theme code (removed functions, deprecations, warnings)
- Replace abandoned plugins with maintained ones, if you prefer
- Work on a staging copy first, with a full backup
- Check compatibility with WordPress 7
You get a short report: what broke, what I fixed, and what to watch.
Before ordering, please send your site URL, the error message or a screenshot, and your current PHP version.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Shuvo Kumar
Shuvo Kumar
Base44 Migration and AI App Developer, Lovable, Supabase, WordPress
- FromBangladesh
- Member sinceMar 2023
- Avg. response time1 hour
- Last delivery1 week
Languages
English, Hindi, French, Spanish
I'm a web developer with 5+ years of experience and a 5.0 rating on Fiverr. I help founders turn AI-built apps into real, secure products.
What I do:
- Base44 app migration: move your app, data and users to Supabase and your own hosting
- Fix and launch Lovable, Bolt, Replit and Base44 apps: auth, database, Stripe, deployment
- WordPress: Elementor sites, WooCommerce stores, speed and maintenance
Clear communication, honest timelines, support after delivery.
Send me your app link and I'll reply with a free plan.
My Portfolio
Other Website Maintenance Services I Offer
FAQ
Will you just switch my PHP version back?
No. That only hides the problem, and old PHP versions don't get security updates. I fix the code so your site runs on PHP 8.3 or 8.4.
Will my site go down while you work?
I work on a staging copy first and take a full backup. The live switch happens at a low-traffic time and takes minutes.
What if one of my plugins is abandoned?
I can patch it to work on PHP 8, or replace it with a maintained plugin that does the same job. You choose.
Which PHP version should my site use?
WordPress recommends PHP 8.3 or newer. I usually move sites to 8.3, or 8.4 if all your plugins support it.
What access do you need?
A WordPress admin login and hosting access (cPanel, hPanel or SFTP). I'll send a checklist after you order.
