Regular Expressions 101

^start of line

Character Class[0-9]

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

Non-Capturing Group(?:[ -]?[0-9]){0,14}

{0,14}repeats the group contents below between 0 and 14 times:

Character Class[ -]?

?matches at most one character from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]

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

$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

Regular Expression

^[0-9](?:[ -]?[0-9]){0,14}$

New

12 57 125-98-457
12-28-35-74-12
12 28 35 74 12
123-478 25 12 124-15
123456789012345
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
1X2
1234567890123456
123-478 25 12 124-156