Regular Expressions 101

^start of line

Group 1(1\s?)?

?repeats the group contents below at most once:

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\s?optionally matches any whitespace character

Group 2($\d{3}$|\d{3})

1st Alternative$\d{3}$

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\d{3}a digit, repeated exactly 3 times

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative\d{3}

\d{3}a digit, repeated exactly 3 times

Character Class[\s\-]?

?matches at most one character from the set below:

\sany whitespace character

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{3}a digit, repeated exactly 3 times

Character Class[\s\-]?

?matches at most one character from the set below:

\sany whitespace character

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{4}a digit, repeated exactly 4 times

$end of line

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

26 tokens

Regular Expression

^(1\s?)?(\(\d{3}\)|\d{3})[\s\-]?\d{3}[\s\-]?\d{4}$

New

555-555-5555
1 555-555-5555
1 (555) 555-5555
5555555555
555-555-5555
(555)555-5555
1(555)555-5555
555-5555
5555555
1 555)555-5555
1 555 555 5555
1 456 789 4444
123**&!!asdf#
55555555
(6054756961)
2 (757) 622-7382
0 (757) 622-7382
-1 (757) 622-7382
2 757 622-7382
10 (757) 622-7382
27576227382
(275)76227382
2(757)6227382
2(757)622-7382
555)-555-5555
(555-555-5555
(555)5(55?)-5555

Regular Expression

Substitution