frankenphp

a59b649d - fix: headers before flushing (#1622)

fix: headers before flushing (#1622) * add tests * fix test * attempt to send headers when flushing * Update testdata/only-headers.php Co-authored-by: Kévin Dunglas <kevin@dunglas.fr> --------- Co-authored-by: Kévin Dunglas <kevin@dunglas.fr>