dynamic: ref/out arg if param not provided
dynamic: ref/out arg if param not provided

ref https://github.com/peachpiecompiler/peachpie/issues/995

iolevel/peachpie-concept,peachpiecompiler/peachpie,iolevel/peachpie-concept,peachpiecompiler/peachpie,iolevel/peachpie-concept,peachpiecompiler/peachpie