Regular Expressions 101

1st Alternative^(?:\d{2,3},)+(\d{2,3}),?$

^start of line

Non-Capturing Group(?:\d{2,3},)+

+repeats the group contents below at least once:

\d{2,3}a digit, repeated between 2 and 3 times

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Group 1(\d{2,3})

\d{2,3}a digit, repeated between 2 and 3 times

,?optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

$end of line

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

^start of line

\d{2,3}a digit, repeated between 2 and 3 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.

Search reference

Regular Expression

^(?:\d{2,3},)+(\d{2,3}),?$|^\d{2,3}$

New

//pass
12,123,56,567,789,11
12,123,56,567,789,11,
12
123

//fail
12,123,56,567,789,11a
a12,123,56,567,789,11
12,123,56,567,789,1
1,123,56,567,789,11
1234,123,56,567,789,11
12,123,56,567,789,1123
1
1234

Regular Expression

Extraction