Regular Expressions 101

Explanation

Pro

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Character Class[0-9]{4}

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

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]{2}

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

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]{2}

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

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

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Group 1(\[(?:debug|warning|error)\])

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Non-Capturing Group(?:debug|warning|error)

1st Alternativedebug

debugthe literal text debug (case sensitive)

2nd Alternativewarning

warningthe literal text warning (case sensitive)

3rd Alternativeerror

errorthe literal text error (case sensitive)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

.*any Unicode character (except for line terminators), repeated any number of 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.

25 tokens

\[[0-9]{4}-[0-9]{2}-[0-9]{2}\](\[(?:debug|warning|error)\]).*