Regular Expressions 101

Pro

HELLOthe literal text HELLO (case sensitive)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Character Class[0-9]+

+matches at least one character from the set below:

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

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Character Class[a-zA-Z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9a-fA-F]{3}

{3}matches exactly 3 characters from the set below:

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

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

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

HELLO\[[0-9]+\]_[a-zA-Z]+\.[0-9a-fA-F]{3}

New

HELLO[345]_something.123
HELLO[23]_BlaBla.FFF
HELLO[]_.123
HELLO[1]_foo.0aC

HELLO[345]_something.123
HELLO[23]_BlaBla.FFF
HELLO[]_.123
HELLO[1]_foo.0aC