Auto Upgrade


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I have a software package that was created with PHP4.1 and I would like it to be auto-upgraded to PHP8.1. Is this possible?
PHP4.1 is too old. But if you can move it to php5 there is a Rector (It can work with PHP 5.x and 8.x code).
My package was enhanced with new features for 10 years and all the way to some php5.x. Would the Rector work with that?
Upgrading a PHP 4.1 software package to PHP 8.1 involves incremental updates through PHP 5.x, 7.x, and finally 8.x, addressing compatibility issues at each stage. Use tools like PHPStan, Rector, and automated testing to aid in the process, and ensure thorough testing before deploying the upgraded code.

Best Regard
Danish hafeez | QA Assistant