Regular Expressions 101

^start of line

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

Group 1(\b[0-9]+\b)

\ban ASCII word boundary

Character Class[0-9]+

+matches at least one character from the set below:

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

\ban ASCII word boundary

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

Group 2(-r\{(.)+\})?

?repeats the group contents below at most once:

-rthe literal text -r (case sensitive)

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

Group 3(.)+

+repeats the group contents below at least once:

.any character (except for line terminators)

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

Group 4(-i\[((\b[0-9]+\b)?:?(\b[0-9]+\b)?)?\])?

?repeats the group contents below at most once:

-ithe literal text -i (case sensitive)

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Group 5((\b[0-9]+\b)?:?(\b[0-9]+\b)?)?

?repeats the group contents below at most once:

Group 6(\b[0-9]+\b)?

?repeats the group contents below at most once:

\ban ASCII word boundary

Character Class[0-9]+

+matches at least one character from the set below:

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

\ban ASCII word boundary

:?optionally matches the literal : (58₁₀ / 72₈ / 3A₁₆)

Group 7(\b[0-9]+\b)?

?repeats the group contents below at most once:

\ban ASCII word boundary

Character Class[0-9]+

+matches at least one character from the set below:

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

\ban ASCII word boundary

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

$end of line

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

^\$\{(\b[0-9]+\b)\}(-r\{(.)+\})?(-i\[((\b[0-9]+\b)?:?(\b[0-9]+\b)?)?\])?$

New

${1}-r{[a-zA-Z]}-i[1:2] ${1}-r{[a-zA-Z]}-i[:88]

Regular Expression

Extraction