Regular Expressions 101

^start of line

Group 1(\()?

?repeats the group contents below at most once:

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 2(\d+)

\d+a digit, repeated at least once

Condition(?(1)\)\-|\-)

Uses the first branch if group 1 matched

If the condition is true, match this branch:\)\-

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Otherwise, match this branch:\-

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 3(\d+\-\d+)

\d+a digit, repeated at least once

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a digit, repeated at least once

$end of line

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.

Search reference

Regular Expression

^(\()?(\d+)(?(1)\)\-|\-)(\d+\-\d+)$

New

123-456-7890
(111-111-1111
111)-111-1111
(123)-456-7890