Negative Lookbehind(?<!\d) Negative Lookahead(?!000|666|9) 9the literal 9 (5710 / 718 / 3916)
?repeats the group contents below at most once:
orderthe literal text order (case insensitive) \W?optionally matches any non-word character
numberthe literal text number (case insensitive) \W*any non-word character, repeated any number of times
Negative Lookbehind(?<!x) xthe literal x (12010 / 1708 / 7816) (case insensitive)
\d{3}a digit, repeated exactly 3 times
Character Class[ .=-]{0,10} {0,10}matches between 0 and 10 characters from the set below:
the literal (3210 / 408 / 2016)
.the literal . (4610 / 568 / 2E16)
=the literal = (6110 / 758 / 3D16)
-the literal - (4510 / 558 / 2D16)
Negative Lookahead(?!000) \d{3}a digit, repeated exactly 3 times
Character Class[ .=-]{0,10} {0,10}matches between 0 and 10 characters from the set below:
the literal (3210 / 408 / 2016)
.the literal . (4610 / 568 / 2E16)
=the literal = (6110 / 758 / 3D16)
-the literal - (4510 / 558 / 2D16)
Negative Lookahead(?!000) \d{3}a digit, repeated exactly 3 times
g modifier: global. Finds all matches instead of stopping after the first
i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string