^start of line
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)
Group 1((?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)+[a-z0-9][a-z0-9-]{0,61}[a-z0-9]) Non-Capturing Group(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)+ +repeats the group contents below at least once:
a-zone character from a (9710) to z (12210) (case sensitive)
0-9one character from 0 (4810) to 9 (5710)
Non-Capturing Group(?:[a-z0-9-]{0,61}[a-z0-9])? ?repeats the group contents below at most once:
Character Class[a-z0-9-]{0,61} {0,61}matches between 0 and 61 characters from the set below:
a-zone character from a (9710) to z (12210) (case sensitive)
0-9one character from 0 (4810) to 9 (5710)
-the literal - (4510 / 558 / 2D16)
a-zone character from a (9710) to z (12210) (case sensitive)
0-9one character from 0 (4810) to 9 (5710)
\.the literal . (4610 / 568 / 2E16)
a-zone character from a (9710) to z (12210) (case sensitive)
0-9one character from 0 (4810) to 9 (5710)
Character Class[a-z0-9-]{0,61} {0,61}matches between 0 and 61 characters from the set below:
a-zone character from a (9710) to z (12210) (case sensitive)
0-9one character from 0 (4810) to 9 (5710)
-the literal - (4510 / 558 / 2D16)
a-zone character from a (9710) to z (12210) (case sensitive)
0-9one character from 0 (4810) to 9 (5710)
\/the literal / (4710 / 578 / 2F16)
@the literal @ (6410 / 1008 / 4016)
Character Class[a-zA-Z0-9\_]+ +matches at least one character from the set below:
a-zone character from a (9710) to z (12210) (case sensitive)
A-Zone character from A (6510) to Z (9010) (case sensitive)
0-9one character from 0 (4810) to 9 (5710)
\_the literal _ (9510 / 1378 / 5F16)
\/the literal / (4710 / 578 / 2F16)
\d+a digit, repeated at least once
$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