I once had to wade into a PHP app for a government procurement website that was just horrifyingly messy. I used to maintain records for the highest line number

I once had to wade into a PHP app for a government procurement website that was just horrifyingly messy. I used to maintain records for the highest line number on which the opening <html> tag appeared in a template (well into the thousands) and the highest number of opening/closing PHP tags (hundreds in a single file). There was no structure beyond bunging stuff in the session and hoping it all hung together. The app ran on Mac servers.