Regular Expressions 101

\ba Unicode word boundary

Character Class[67]

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

7the literal 7 (55₁₀ / 67₈ / 37₁₆)

Non-Capturing Group(?:-?\d){7}

{7}repeats the group contents below exactly 7 times:

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

\da Unicode decimal digit

\ba Unicode word boundary

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

Regular Expression

\b[67](?:-?\d){7}\b

New

71234567
6-1234567
7-123-4567
61-23-45-67
7-1-2-3-4-5-6-7

1 71234567!
2 6-1234567, text
3 7-123-4567...
4 61-23-45-67?
5 7-1-2-3-4-5-6-7|

71234567
6-1234567
7-123-4567
61-23-45-67
7-1-2-3-4-5-6-7

1 71234567!
2 6-1234567, text
3 7-123-4567...
4 61-23-45-67?
5 7-1-2-3-4-5-6-7|