Regular Expressions 101

Pro

1st Alternative-\s*\d{7}(?!\d)(*SKIP)(*F)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\s*any whitespace character, repeated any number of times

\d{7}a digit, repeated exactly 7 times

Negative Lookahead(?!\d)

\da digit

(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character

(*F)forces the current match attempt to fail at this position

2nd Alternative(?<!\d)\d{7}(?!\d)

Negative Lookbehind(?<!\d)

\da digit

\d{7}a digit, repeated exactly 7 times

Negative Lookahead(?!\d)

\da digit

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

-\s*\d{7}(?!\d)(*SKIP)(*F)|(?<!\d)\d{7}(?!\d)

New

RE:'HC=312-822-281' abc2-1234567 7354612
RE:'HC=312-822-281' abc2- 1234567 7354612