regex101: PCRE2 (PHP) Substitution Workspace

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

Group 1((?:\b(?:[djms]rs?|flam|liq|qr|st)\.|\b(?:[a-z]\.){2,}|\.\d[\d.]*|\.(?:com|net|org)\b|[^.?!])+(?:[.?!]+|$))

Non-Capturing Group(?:\b(?:[djms]rs?|flam|liq|qr|st)\.|\b(?:[a-z]\.){2,}|\.\d[\d.]*|\.(?:com|net|org)\b|[^.?!])+

+repeats the group contents below at least once:

1st Alternative\b(?:[djms]rs?|flam|liq|qr|st)\.

\ban ASCII word boundary

Non-Capturing Group(?:[djms]rs?|flam|liq|qr|st)

1st Alternative[djms]rs?

Character Class[djms]

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case insensitive)

jthe literal j (106₁₀ / 152₈ / 6A₁₆) (case insensitive)

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (case insensitive)

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

rthe literal r (114₁₀ / 162₈ / 72₁₆) (case insensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case insensitive)

2nd Alternativeflam

flamthe literal text flam (case insensitive)

3rd Alternativeliq

liqthe literal text liq (case insensitive)

4th Alternativeqr

qrthe literal text qr (case insensitive)

5th Alternativest

stthe literal text st (case insensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

2nd Alternative\b(?:[a-z]\.){2,}

\ban ASCII word boundary

Non-Capturing Group(?:[a-z]\.){2,}

{2,}repeats the group contents below at least 2 times:

Character Class[a-z]

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

3rd Alternative\.\d[\d.]*

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\da digit

Character Class[\d.]*

*matches any number of characters from the set below:

\da digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

4th Alternative\.(?:com|net|org)\b

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:com|net|org)

1st Alternativecom

comthe literal text com (case insensitive)

2nd Alternativenet

netthe literal text net (case insensitive)

3rd Alternativeorg

orgthe literal text org (case insensitive)

\ban ASCII word boundary

5th Alternative[^.?!]

Negated Character Class[^.?!]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

Non-Capturing Group(?:[.?!]+|$)

1st Alternative[.?!]+

Character Class[.?!]+

+matches at least one character from the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

2nd Alternative$

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

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

25 tokens

Regular Expression

\s*((?:\b(?:[djms]rs?|flam|liq|qr|st)\.|\b(?:[a-z]\.){2,}|\.\d[\d.]*|\.(?:com|net|org)\b|[^.?!])+(?:[.?!]+|$))

New

Section 2.1. Classification of Subsatnces 

Mr. and Mrs. Smith bought cheapsite.com for 1.5 million dollars, i.e. he paid a lot for it. Did he mind? Dr. Adam Jones Jr. thinks he didn't. In any case, this isn't true... Well, with a probability of .9 it isn't.However, this line wont do it. Qr. Test for Website.COM and Labs.ORG looks good.Creatively not working. t and finished. 9 to start. Highly Flammable Liquid Flam. H223 Liq. H334. 
St. Bernard Dog was present.
The MW of gold is 100.1. Solubility is 40mg/L.

Substitution

$1\n

Section 2.1. Classification of Subsatnces 

Mr. and Mrs. Smith bought cheapsite.com for 1.5 million dollars, i.e. he paid a lot for it. Did he mind? Dr. Adam Jones Jr. thinks he didn't. In any case, this isn't true... Well, with a probability of .9 it isn't.However, this line wont do it. Qr. Test for Website.COM and Labs.ORG looks good.Creatively not working. t and finished. 9 to start. Highly Flammable Liquid Flam. H223 Liq. H334. 
St. Bernard Dog was present.
The MW of gold is 100.1. Solubility is 40mg/L.