regex101: PCRE2 (PHP) Match Workspace

1st Alternative(((20[012]\d|19\d\d)|(1\d|2[0123]))-((0[0-9])|(1[012]))-((0[1-9])|([12][0-9])|(3[01])))

Group 1(((20[012]\d|19\d\d)|(1\d|2[0123]))-((0[0-9])|(1[012]))-((0[1-9])|([12][0-9])|(3[01])))

Group 2((20[012]\d|19\d\d)|(1\d|2[0123]))

1st Alternative(20[012]\d|19\d\d)

Group 3(20[012]\d|19\d\d)

1st Alternative20[012]\d

20the literal text 20

Character Class[012]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

\da digit

2nd Alternative19\d\d

19the literal text 19

\da digit

2nd Alternative(1\d|2[0123])

Group 4(1\d|2[0123])

1st Alternative1\d

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\da digit

2nd Alternative2[0123]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0123]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 5((0[0-9])|(1[012]))

1st Alternative(0[0-9])

Group 6(0[0-9])

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[0-9]

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

2nd Alternative(1[012])

Group 7(1[012])

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[012]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 8((0[1-9])|([12][0-9])|(3[01]))

1st Alternative(0[1-9])

Group 9(0[1-9])

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

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

2nd Alternative([12][0-9])

Group 10([12][0-9])

3rd Alternative(3[01])

2nd Alternative(((0[1-9])|([12][0-9])|(3[01]))-((0[0-9])|(1[012]))-((20[012]\d|19\d\d)|(1\d|2[0123])))

3rd Alternative(((20[012]\d|19\d\d)|(1\d|2[0123]))\/((0[0-9])|(1[012]))\/((0[1-9])|([12][0-9])|(3[01])))

4th Alternative(((0[0-9])|(1[012]))\/((0[1-9])|([12][0-9])|(3[01]))\/((20[012]\d|19\d\d)|(1\d|2[0123])))

5th Alternative(((0[1-9])|([12][0-9])|(3[01]))\/((0[0-9])|(1[012]))\/((20[012]\d|19\d\d)|(1\d|2[0123])))

6th Alternative(((0[1-9])|([12][0-9])|(3[01]))\.((0[0-9])|(1[012]))\.((20[012]\d|19\d\d)|(1\d|2[0123])))

7th Alternative(((20[012]\d|19\d\d)|(1\d|2[0123]))\.((0[0-9])|(1[012]))\.((0[1-9])|([12][0-9])|(3[01])))

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

Search reference

Regular Expression

(((20[012]\d|19\d\d)|(1\d|2[0123]))-((0[0-9])|(1[012]))-((0[1-9])|([12][0-9])|(3[01])))|(((0[1-9])|([12][0-9])|(3[01]))-((0[0-9])|(1[012]))-((20[012]\d|19\d\d)|(1\d|2[0123])))|(((20[012]\d|19\d\d)|(1\d|2[0123]))\/((0[0-9])|(1[012]))\/((0[1-9])|([12][0-9])|(3[01])))|(((0[0-9])|(1[012]))\/((0[1-9])|([12][0-9])|(3[01]))\/((20[012]\d|19\d\d)|(1\d|2[0123])))|(((0[1-9])|([12][0-9])|(3[01]))\/((0[0-9])|(1[012]))\/((20[012]\d|19\d\d)|(1\d|2[0123])))|(((0[1-9])|([12][0-9])|(3[01]))\.((0[0-9])|(1[012]))\.((20[012]\d|19\d\d)|(1\d|2[0123])))|(((20[012]\d|19\d\d)|(1\d|2[0123]))\.((0[0-9])|(1[012]))\.((0[1-9])|([12][0-9])|(3[01])))

New

work:
2022-01-01
01-01-2020
1990/01/01
12/30/2020
30/12/2020
30.12.2020
2020.12.30
19-12-30
30-12-19
2020/12/30
12/30/19
30/12/19
30.12.19
19.12.30

not work:
1022-01-01
01-15-2020
2990/01/01
13/30/2020
30/13/2020
30.12.9029
2020.14.30
2020.12.33
19-12-33
19-13-30
33-12-19
30-12-35
2020/13/30
2020/12/34
12/30/29
30/12/29
30.12.26
30.12.30
13/30/19
30/13/19
30.13.19
19.13.30
12/33/19
33/12/19
33.12.19
19.12.33
1/1/19
1/01/19
01/1/19
1/01/2019
1/1/2019
01/1/2019

Regular Expressions 101

Regular Expression

Extraction