Non-Capturing Group(?:http|ftp) httpthe literal text http (case insensitive) ftpthe literal text ftp (case insensitive) s?optionally matches the literal s (11510 / 1638 / 7316) (case insensitive)
:the literal : (5810 / 728 / 3A16)
\/the literal / (4710 / 578 / 2F16)
\/the literal / (4710 / 578 / 2F16)
\S*any non-whitespace character, repeated any number of times
\.the literal . (4610 / 568 / 2E16)
\S*any non-whitespace character, repeated any number of times
Positive Lookahead(?="|<) "the literal " (3410 / 428 / 2216)
<the literal < (6010 / 748 / 3C16)
g modifier: global. Finds all matches instead of stopping after the first
i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters