Regular Expressions 101

Group 1(0[1-9]|[12][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 Alternative[12][0-9]

Character Class[12]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-9]

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

3rd Alternative3[01]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[01]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

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)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group 3(\d{1,4})

\d{1,4}a digit, repeated between 1 and 4 times

\s+any whitespace character, repeated at least once

Group 4(\d{1,2})

\d{1,2}a digit, repeated between 1 and 2 times

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group 5(\d{1,2})

\d{1,2}a digit, repeated between 1 and 2 times

\s+any whitespace character, repeated at least once

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\s+any whitespace character, repeated at least once

Group 6(\w{2})

\w{2}any word character, repeated exactly 2 times

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(0[1-9]|[12][0-9]|3[01]):(0[1-9]|1[012]):(\d{1,4})\s+(\d{1,2}):(\d{1,2})\s+-\s+(\w{2})

New

21:10:1999 12:12 - ss
01:10:1999 12:12 - ss

Regular Expression

Substitution