regex101: PCRE (Legacy) Match Workspace

1st Alternative^((0[13578]|1[02])[\/.]31[\/.](19|20)[0-9]{2})$

^start of line

Group 1((0[13578]|1[02])[\/.]31[\/.](19|20)[0-9]{2})

Group 2(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)

Character Class[\/.]

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

31the literal text 31

Character Class[\/.]

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 3(19|20)

1st Alternative19

19the literal text 19

2nd Alternative20

20the literal text 20

Character Class[0-9]{2}

{2}matches exactly 2 characters from the set below:

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

$end of line

2nd Alternative^((01|0[3-9]|1[1-2])[\/.](29|30)[\/.](19|20)[0-9]{2})$

^start of line

Group 4((01|0[3-9]|1[1-2])[\/.](29|30)[\/.](19|20)[0-9]{2})

Group 5(01|0[3-9]|1[1-2])

1st Alternative01

01the literal text 01

2nd Alternative0[3-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[3-9]

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

3rd Alternative1[1-2]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[1-2]

1-2one character from 1 (49₁₀) to 2 (50₁₀)

Character Class[\/.]

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 6(29|30)

1st Alternative29

29the literal text 29

2nd Alternative30

30the literal text 30

Character Class[\/.]

Group 7(19|20)

Character Class[0-9]{2}

$end of line

3rd Alternative^((0[1-9]|1[0-2])[\/.](0[1-9]|1[0-9]|2[0-8])[\/.](19|20)[0-9]{2})$

4th Alternative^((02)[\/.]29[\/.](((19|20)(04|08|[2468][048]|[13579][26]))|2000))$

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

^((0[13578]|1[02])[\/.]31[\/.](19|20)[0-9]{2})$|^((01|0[3-9]|1[1-2])[\/.](29|30)[\/.](19|20)[0-9]{2})$|^((0[1-9]|1[0-2])[\/.](0[1-9]|1[0-9]|2[0-8])[\/.](19|20)[0-9]{2})$|^((02)[\/.]29[\/.](((19|20)(04|08|[2468][048]|[13579][26]))|2000))$

New

01/30/2016a
01/30/2016

Regular Expressions 101

Regular Expression

Substitution