Regular Expressions 101

Explanation

Pro

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

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[0-9]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-9]

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

3rd Alternative2[0-9]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-9]

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

4th Alternative3[01]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[01]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

.any character (except for line terminators)

Group 2(0[1-9]|1[012])

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[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)

.any character (except for line terminators)

Group 3([0-9]{4})

Character Class[0-9]{4}

{4}matches exactly 4 characters from the set below:

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

Group 4( ([0-1]\d|2[0-3])(:[0-5]\d){2}|)

1st Alternative ([0-1]\d|2[0-3])(:[0-5]\d){2}

the literal (32₁₀ / 40₈ / 20₁₆)

Group 5([0-1]\d|2[0-3])

1st Alternative[0-1]\d

Character Class[0-1]

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

\da digit

2nd Alternative2[0-3]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-3]

0-3one character from 0 (48₁₀) to 3 (51₁₀)

Group 6(:[0-5]\d){2}

{2}repeats the group contents below exactly 2 times:

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

\da digit

2nd Alternative — matches an empty string

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(0[1-9]|1[0-9]|2[0-9]|3[01]).(0[1-9]|1[012]).([0-9]{4})( ([0-1]\d|2[0-3])(:[0-5]\d){2}|)

New

21.10.2013 13:27:35

Substitution

21.10.2013 13:27:35