Regular Expressions 101

Pro

1st Alternative^1? ?($[2-9]{3}$ ?|[0-9]{3}(-| ))[0-9]{3}(-| )[0-9]{4}$

^start of line

1?optionally matches the literal 1 (49₁₀ / 61₈ / 31₁₆)

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

Group 1($[2-9]{3}$ ?|[0-9]{3}(-| ))

1st Alternative$[2-9]{3}$ ?

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Character Class[2-9]{3}

{3}matches exactly 3 characters from the set below:

2-9one character from 2 (50₁₀) to 9 (57₁₀)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

2nd Alternative[0-9]{3}(-| )

Character Class[0-9]{3}

{3}matches exactly 3 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 2(-| )

1st Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

2nd Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[0-9]{3}

{3}matches exactly 3 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 3(-| )

1st Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

2nd Alternative

the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[0-9]{4}

{4}matches exactly 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

$end of line

2nd Alternative^[\d]{10}$

^start of line

Character Class[\d]{10}

{10}matches exactly 10 characters from the set below:

\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.

26 tokens

^1? ?(\([2-9]{3}\) ?|[0-9]{3}(-| ))[0-9]{3}(-| )[0-9]{4}$|^[\d]{10}$

New

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

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