Regular Expressions 101

Pro

^start of line

\+?optionally matches the literal + (43₁₀ / 53₈ / 2B₁₆)

Non-Capturing Group(?:1(\s|-|\.)?)?

?repeats the group contents below at most once:

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Group 1(\s|-|\.)?

?repeats the group contents below at most once:

1st Alternative\s

\sany whitespace character

2nd Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

3rd Alternative\.

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 2(\d{3}\1?\d{3}\1?\d{4})

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

\1?optionally matches the text saved by group 1

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

\1?optionally matches the text saved by group 1

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

$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.

26 tokens

^\+?(?:1(\s|-|\.)?)?(\d{3}\1?\d{3}\1?\d{4})$

New

1 555 222 5545
1-555-222-5562
.555-222-5562
5552226585
+1.888.558.5585
1 5552223334