regex101: PCRE (Legacy) Match Workspace

^start of string

Positive Lookahead(?=\d{2}([-.,\/])\d{2}\1\d{4}$)

\d{2}a digit, repeated exactly 2 times

Group 1([-.,\/])

Character Class[-.,\/]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\d{2}a digit, repeated exactly 2 times

\1the text saved by group 1

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

$end of string, or before its final line terminator

Non-Capturing Group(?:0[1-9]|1\d|[2][0-8]|29(?!.02.(?!(?!(?:[02468][1-35-79]|[13579][0-13-57-9])00)\d{2}(?:[02468][048]|[13579][26])))|30(?!.02)|31(?=.(?:0[13578]|10|12)))

1st Alternative0[1-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative1\d

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\da digit

3rd Alternative[2][0-8]

Character Class[2]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-8]

0-8one character from 0 (48₁₀) to 8 (56₁₀)

4th Alternative29(?!.02.(?!(?!(?:[02468][1-35-79]|[13579][0-13-57-9])00)\d{2}(?:[02468][048]|[13579][26])))

29the literal text 29

Negative Lookahead(?!.02.(?!(?!(?:[02468][1-35-79]|[13579][0-13-57-9])00)\d{2}(?:[02468][048]|[13579][26])))

.any character (except for line terminators)

02the literal text 02

.any character (except for line terminators)

Negative Lookahead(?!(?!(?:[02468][1-35-79]|[13579][0-13-57-9])00)\d{2}(?:[02468][048]|[13579][26]))

Negative Lookahead(?!(?:[02468][1-35-79]|[13579][0-13-57-9])00)

Non-Capturing Group(?:[02468][1-35-79]|[13579][0-13-57-9])

1st Alternative[02468][1-35-79]

Character Class[02468]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

Character Class[1-35-79]

1-3one character from 1 (49₁₀) to 3 (51₁₀)

5-7one character from 5 (53₁₀) to 7 (55₁₀)

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

2nd Alternative[13579][0-13-57-9]

Character Class[13579]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

7the literal 7 (55₁₀ / 67₈ / 37₁₆)

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

Character Class[0-13-57-9]

0-1one character from 0 (48₁₀) to 1 (49₁₀)

3-5one character from 3 (51₁₀) to 5 (53₁₀)

7-9one character from 7 (55₁₀) to 9 (57₁₀)

00the literal text 00

\d{2}a digit, repeated exactly 2 times

Non-Capturing Group(?:[02468][048]|[13579][26])

1st Alternative[02468][048]

Character Class[02468]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

Character Class[048]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

2nd Alternative[13579][26]

5th Alternative30(?!.02)

6th Alternative31(?=.(?:0[13578]|10|12))

.any character (except for line terminators)

Non-Capturing Group(?:0[1-9]|1[012])

.any character (except for line terminators)

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

$end of string, or before its final line terminator

25 tokens

Regular Expression

^(?=\d{2}([-.,\/])\d{2}\1\d{4}$)(?:0[1-9]|1\d|[2][0-8]|29(?!.02.(?!(?!(?:[02468][1-35-79]|[13579][0-13-57-9])00)\d{2}(?:[02468][048]|[13579][26])))|30(?!.02)|31(?=.(?:0[13578]|10|12))).(?:0[1-9]|1[012]).\d{4}$

New

29/02/2000

Regular Expressions 101

Regular Expression

Extraction