Regular Expressions 101

Pro

1st Alternative\b(\d{1,2}\s+\d{1,2}\s+\d{4})\b

\ba Unicode word boundary

Group 1(\d{1,2}\s+\d{1,2}\s+\d{4})

\d{1,2}a Unicode decimal digit, repeated between 1 and 2 times

\s+a Unicode whitespace character, repeated at least once

\d{1,2}a Unicode decimal digit, repeated between 1 and 2 times

\s+a Unicode whitespace character, repeated at least once

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

\ba Unicode word boundary

2nd Alternative(\d+)\s+(?!\D|\d{1,2}\s+\d{1,2}\s+\d{4}\b)

Group 2(\d+)

\d+a Unicode decimal digit, repeated at least once

\s+a Unicode whitespace character, repeated at least once

Negative Lookahead(?!\D|\d{1,2}\s+\d{1,2}\s+\d{4}\b)

1st Alternative\D

\Dany character that is not a Unicode decimal digit

2nd Alternative\d{1,2}\s+\d{1,2}\s+\d{4}\b

\d{1,2}a Unicode decimal digit, repeated between 1 and 2 times

\s+a Unicode whitespace character, repeated at least once

\d{1,2}a Unicode decimal digit, repeated between 1 and 2 times

\s+a Unicode whitespace character, repeated at least once

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

\ba Unicode word boundary

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.

25 tokens

\b(\d{1,2}\s+\d{1,2}\s+\d{4})\b|(\d+)\s+(?!\D|\d{1,2}\s+\d{1,2}\s+\d{4}\b)

New

0 1 loren ipsum 1 2 3 dolor sit 4 5 6 amet -7 8 9 1- date 13 06 2022

1 1 1970

test 1 2 3 13 7 2022

\1\2

0 1 loren ipsum 1 2 3 dolor sit 4 5 6 amet -7 8 9 1- date 13 06 2022

1 1 1970

test 1 2 3 13 7 2022