regex101: PCRE (Legacy) Match Workspace

1st Alternative^(?:(?:31([-\/.]?)(?:0[13578]|1[02]))\1|(?:(?:29|30)([-\/.]?)(?:0[1,3-9]|1[0-2])\2))(?:(?:1[6-9]|[2-9]\d)\d{2})$

^start of line

Non-Capturing Group(?:(?:31([-\/.]?)(?:0[13578]|1[02]))\1|(?:(?:29|30)([-\/.]?)(?:0[1,3-9]|1[0-2])\2))

1st Alternative(?:31([-\/.]?)(?:0[13578]|1[02]))\1

Non-Capturing Group(?:31([-\/.]?)(?:0[13578]|1[02]))

31the literal text 31

Group 1([-\/.]?)

Character Class[-\/.]?

?matches at most one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:0[13578]|1[02])

1st Alternative0[13578]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[13578]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

7the literal 7 (55₁₀ / 67₈ / 37₁₆)

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

2nd Alternative1[02]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[02]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

\1the text saved by group 1

2nd Alternative(?:(?:29|30)([-\/.]?)(?:0[1,3-9]|1[0-2])\2)

Non-Capturing Group(?:(?:29|30)([-\/.]?)(?:0[1,3-9]|1[0-2])\2)

Non-Capturing Group(?:29|30)

1st Alternative29

29the literal text 29

2nd Alternative30

30the literal text 30

Group 2([-\/.]?)

Character Class[-\/.]?

?matches at most one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:0[1,3-9]|1[0-2])

1st Alternative0[1,3-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1,3-9]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

3-9one character from 3 (51₁₀) to 9 (57₁₀)

2nd Alternative1[0-2]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-2]

0-2one character from 0 (48₁₀) to 2 (50₁₀)

\2the text saved by group 2

Non-Capturing Group(?:(?:1[6-9]|[2-9]\d)\d{2})

Non-Capturing Group(?:1[6-9]|[2-9]\d)

1st Alternative1[6-9]

2nd Alternative[2-9]\d

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

$end of line

2nd Alternative^(?:29([-\/.]?)02\3(?:(?:(?:1[6-9]|[2-9]\d)(?:0[48]|[2468][048]|[13579][26]))))$

3rd Alternative^(?:0[1-9]|1\d|2[0-8])([-\/.]?)(?:(?:0[1-9])|(?:1[0-2]))\4(?:(?:1[6-9]|[2-9]\d)\d{2})$

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

25 tokens

Regular Expression

^(?:(?:31([-\/.]?)(?:0[13578]|1[02]))\1|(?:(?:29|30)([-\/.]?)(?:0[1,3-9]|1[0-2])\2))(?:(?:1[6-9]|[2-9]\d)\d{2})$|^(?:29([-\/.]?)02\3(?:(?:(?:1[6-9]|[2-9]\d)(?:0[48]|[2468][048]|[13579][26]))))$|^(?:0[1-9]|1\d|2[0-8])([-\/.]?)(?:(?:0[1-9])|(?:1[0-2]))\4(?:(?:1[6-9]|[2-9]\d)\d{2})$

New

02/04/2012
30-04-2017
12122019
12.01.2019

-- datas inválidas
29/02/2017
20-10/2019
31.04.2017
10/10/10
1/1/2019

Regular Expressions 101

Regular Expression

Extraction