salam doston agr aap me sy koi web designer hia to ya btai k file ko HTML ya php extension k sat kise save karte plz detail k sath btain or kia hum file ko dono extension k sath save kar sakte hain or HTML k sath sve ki hue file ko jub hum php k sath sve karein to kia s sy html k cods per koi fark pare ga?