Version distance matters
A larger jump between PHP generations increases the chance that deprecated behavior, strict typing changes or removed functions become visible.
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Free WordPress Tool
PHP Version Migration Readiness Checker
Estimate WordPress migration risk when changing PHP versions between the source and destination server.
Free to useNo account requiredRuns in your browser
Planning result
Ready
Adjust the inputs to generate a planning recommendation.
Technical explanation
How to interpret this tool before a WordPress migration
Changing PHP during a hosting migration can expose deprecated functions, extension differences, plugin assumptions and custom-code failures that never appeared on the source server. The safest approach is to separate compatibility testing from the production DNS switch whenever possible.
Plugins and custom code are the unknowns
Recently maintained plugins usually adapt faster than abandoned code. Old integrations deserve direct testing rather than assumptions.
Stage the target runtime first
Run the destination PHP version privately, inspect PHP logs and test business-critical paths before production traffic moves.
Practical questions
Should I upgrade PHP during migration?
You can, but combining two changes increases troubleshooting complexity. Test the target PHP version on staging first.
What should I test?
Admin, forms, cron, WooCommerce checkout, payment callbacks, imports, exports and any custom integrations.
Can a site load but still be incompatible?
Yes. Background jobs, AJAX requests or rarely used paths may fail even if the homepage looks normal.