Building PHP 7.4 from source with only --with-ffi doesn't work, because composer itself demands openssl, and phpunit demands mbstring, so this updates the README to also document the transient extension dependencies and avoid a naive user needing to re-build PHP 7.4 multiple times when following the instructions.
Building PHP 7.4 from source with only
--with-ffi
doesn't work, because composer itself demands openssl, and phpunit demands mbstring, so this updates the README to also document the transient extension dependencies and avoid a naive user needing to re-build PHP 7.4 multiple times when following the instructions.