Regular Expressions 101

^start of line

\da digit

\ *the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

Non-Capturing Group(?:$\d+$)?

?repeats the group contents below at most once:

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\d+a digit, repeated at least once

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Character Class[- \d]+

+matches at least one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

\da digit

$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\ *(?:\(\d+\))?[- \d]+$

New

yes
1 (555) 555-5555
5555555555
1 555-555-5555
555-555-5555

no
1 555)555-5555
(6505552368)
10 (757) 622-7382
555)-555-5555