regex101: Error in Refex

1st Alternative\d+[.,]?(\d+\s*k?|x{2,3})(?=\s*(original|actual|highway)?\s*miles)

\d+a digit, repeated at least once

Character Class[.,]?

?matches at most one character from the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Group 1(\d+\s*k?|x{2,3})

1st Alternative\d+\s*k?

\d+a digit, repeated at least once

\s*any whitespace character, repeated any number of times

k?optionally matches the literal k (107₁₀ / 153₈ / 6B₁₆) (case insensitive)

2nd Alternativex{2,3}

x{2,3}the literal x (120₁₀ / 170₈ / 78₁₆) (case insensitive), repeated between 2 and 3 times

Positive Lookahead(?=\s*(original|actual|highway)?\s*miles)

\s*any whitespace character, repeated any number of times

Group 2(original|actual|highway)?

?repeats the group contents below at most once:

1st Alternativeoriginal

originalthe literal text original (case insensitive)

2nd Alternativeactual

actualthe literal text actual (case insensitive)

3rd Alternativehighway

highwaythe literal text highway (case insensitive)

\s*any whitespace character, repeated any number of times

milesthe literal text miles (case insensitive)

2nd Alternative(?<=mile(s|agex?):?\s*(is|~)?\s*)\d+[.,]?(\d+(\s*k)?|x{2,3})

Positive Lookbehind(?<=mile(s|agex?):?\s*(is|~)?\s*)

milethe literal text mile (case insensitive)

Group 3(s|agex?)

1st Alternatives

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case insensitive)

2nd Alternativeagex?

agethe literal text age (case insensitive)

x?optionally matches the literal x (120₁₀ / 170₈ / 78₁₆) (case insensitive)

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

\s*any whitespace character, repeated any number of times

Group 4(is|~)?

?repeats the group contents below at most once:

1st Alternativeis

isthe literal text is (case insensitive)

2nd Alternative~

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

\s*any whitespace character, repeated any number of times

\d+a digit, repeated at least once

Character Class[.,]?

?matches at most one character from the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Group 5(\d+(\s*k)?|x{2,3})

1st Alternative\d+(\s*k)?

\d+a digit, repeated at least once

Group 6(\s*k)?

?repeats the group contents below at most once:

\s*any whitespace character, repeated any number of times

kthe literal k (107₁₀ / 153₈ / 6B₁₆) (case insensitive)

2nd Alternativex{2,3}

x{2,3}the literal x (120₁₀ / 170₈ / 78₁₆) (case insensitive), repeated between 2 and 3 times

3rd Alternative(\d+(\s*K)|x{2,3})

Group 7(\d+(\s*K)|x{2,3})

1st Alternative\d+(\s*K)

2nd Alternativex{2,3}

Global pattern flags

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Search reference

Regular Expression

\d+[.,]?(\d+\s*k?|x{2,3})(?=\s*(original|actual|highway)?\s*miles)|(?<=mile(s|agex?):?\s*(is|~)?\s*)\d+[.,]?(\d+(\s*k)?|x{2,3})|(\d+(\s*K)|x{2,3})

New

123456789012

Regular Expressions 101

Regular Expression

Extraction