^start of line
?repeats the group contents below at most once:
http:the literal text http: (case sensitive) \/the literal / (4710 / 578 / 2F16)
\/the literal / (4710 / 578 / 2F16)
?repeats the group contents below at most once:
wwwthe literal text www (case sensitive) \.the literal . (4610 / 568 / 2E16)
\w+any word character, repeated at least once
\.the literal . (4610 / 568 / 2E16)
\w{1,3}any word character, repeated between 1 and 3 times
$end of line
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string