I have a legacy Shop Script store still running on PHP 5.6. I’ve cloned the entire site to a test server (you’ll reach it by adding an entry to your hosts file) and now need it running cleanly on PHP 8.3. My two biggest worries are security risks and smooth compatibility with the new PHP version, so the work must keep every existing feature intact while hardening the codebase. A previous freelancer touched several core files before vanishing. Your first job is to locate every file he changed (modified dates should guide you), review that code for correctness and hidden threats, and confirm it behaves exactly as intended. With that audit complete, you’ll finish the upgrade itself: updating deprecated syntax, refactoring where necessary, and ensuring the storefront, checkout, and admin panels all operate without warnings or errors under PHP 8.3. All edits must be tracked—Git, diff patches, or another clear method—so I can merge them back to production later. Deliverables • Fully upgraded, tested Shop Script running on PHP 8.3 • Confirmation that functionality is unchanged, files are free of malicious code, and security is strengthened Please attach a detailed project proposal including an estimated timeline and budget.