Regular Expressions 101

Pro

1st Alternative^\d{1,14}$

^start of line

\d{1,14}a digit, repeated between 1 and 14 times

$end of line

2nd Alternative ^\d{3}-\d{1,3}$

^start of line

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{1,3}a digit, repeated between 1 and 3 times

$end of line

3rd Alternative ^\d{3}-\d{1,3}-\d{1,4}$

^start of line

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{1,3}a digit, repeated between 1 and 3 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{1,4}a digit, repeated between 1 and 4 times

$end of line

4th Alternative ^\d{3}-\d{1,3}-\d{1,4}\s\d{1,4}$

^start of line

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{1,3}a digit, repeated between 1 and 3 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{1,4}a digit, repeated between 1 and 4 times

\sany whitespace character

\d{1,4}a digit, repeated between 1 and 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

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Detailed match information will be displayed here automatically.

25 tokens

^\d{1,14}$       | 
^\d{3}-\d{1,3}$  | 
^\d{3}-\d{1,3}-\d{1,4}$  |
^\d{3}-\d{1,3}-\d{1,4}\s\d{1,4}$

New

333
333-3
333-333-3333
333-333-3333 3333
33333333333333

333
333-3
333-333-3333
333-333-3333 3333
33333333333333