regex101: PCRE (Legacy) Match Workspace

Pro

1st Alternative.*(?:\d(?:\.\d+)?\s*x\s*)?\K(?<!\d)\d+(?:\.\d+)?(?:k?g|m?l)\b

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

Non-Capturing Group(?:\d(?:\.\d+)?\s*x\s*)?

?repeats the group contents below at most once:

\da digit

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

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

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case insensitive)

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

\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match

Negative Lookbehind(?<!\d)

\da digit

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:k?g|m?l)

1st Alternativek?g

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

gthe literal g (103₁₀ / 147₈ / 67₁₆) (case insensitive)

2nd Alternativem?l

m?optionally matches the literal m (109₁₀ / 155₈ / 6D₁₆) (case insensitive)

lthe literal l (108₁₀ / 154₈ / 6C₁₆) (case insensitive)

\ban ASCII word boundary

2nd Alternative(?<!\d)\d+(?:\.\d+)?(?:k?g|m?l)(?=\s*x\s*\d)

Negative Lookbehind(?<!\d)

\da digit

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:k?g|m?l)

1st Alternativek?g

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

gthe literal g (103₁₀ / 147₈ / 67₁₆) (case insensitive)

2nd Alternativem?l

m?optionally matches the literal m (109₁₀ / 155₈ / 6D₁₆) (case insensitive)

lthe literal l (108₁₀ / 154₈ / 6C₁₆) (case insensitive)

Positive Lookahead(?=\s*x\s*\d)

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

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case insensitive)

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

\da digit

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

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

25 tokens

Regular Expression

.*(?:\d(?:\.\d+)?\s*x\s*)?\K(?<!\d)\d+(?:\.\d+)?(?:k?g|m?l)\b|(?<!\d)\d+(?:\.\d+)?(?:k?g|m?l)(?=\s*x\s*\d)

New

product brand A 1237ml Bundle of 6
product milk choc370ML
brand milk Vanilla Flavor 850g
One 2400g, For 0-6 Month-Old Infants
a+...two...6-12months...11.2kg...milk
a+...two...11.2kg 6-12months ..milk
Product 200g (10x2g)
[200g] Product
Product A brand(300g)
Product 200g (20g x 10)

Substitution

product brand A 1237ml Bundle of 6
product milk choc370ML
brand milk Vanilla Flavor 850g
One 2400g, For 0-6 Month-Old Infants
a+...two...6-12months...11.2kg...milk
a+...two...11.2kg 6-12months ..milk
Product 200g (10x2g)
[200g] Product
Product A brand(300g)
Product 200g (20g x 10)