?repeats the group contents below at most once:
httpthe literal text http (case sensitive) s?optionally matches the literal s (11510 / 1638 / 7316) (case sensitive)
:the literal : (5810 / 728 / 3A16)
\/the literal / (4710 / 578 / 2F16)
\/the literal / (4710 / 578 / 2F16)
?repeats the group contents below at most once:
wwwthe literal text www (case sensitive) .any character (except for line terminators)
mthe literal m (10910 / 1558 / 6D16) (case sensitive)
.any character (except for line terminators)