I have a vanilla PHP application that writes to a MySQL database managed through phpMyAdmin. Everything was fine until recently: numeric values entered through one of my user-facing forms no longer make it into the table. The page posts without any visible error, but nothing is inserted or updated. I’ll give you the relevant PHP files, a staging database login, and the exact steps to replicate the problem. Your job is to trace the flow, identify the point of failure—whether it’s in the SQL, validation, or connection layer—and deliver a clean, well-documented fix. Deliverables: • The form reliably saving numeric data to the correct table and reflecting the change on refresh. • A short note summarising what you found and the lines you modified so I can follow the logic. No frameworks or ORMs involved, so familiarity with procedural PHP, mysqli / PDO, and general debugging is essential. I’d like to wrap this up quickly; if you can turn it around within a day, even better.