regex101: PCRE2 (PHP) Match Workspace

Pro

Non-Atomic Positive Lookahead(?*\[size=\d+].*?\[/size](.*))

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

size=the literal text size= (case sensitive)

\d+a digit, repeated at least once

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

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

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

/size]the literal text /size] (case sensitive)

Group 1(.*)

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

Positive Lookahead(?=.{24,40}\1$)

.{24,40}any character (except for line terminators), repeated between 24 and 40 times

\1the text saved by group 1

$end of line

.{0,39}any character (except for line terminators), repeated between 0 and 39 times

tthe literal t (116₁₀ / 164₈ / 74₁₆) (case sensitive)

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

Positive Lookahead(?=\1$)

\1the text saved by group 1

$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

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

25 tokens

Regular Expression

(?*\[size=\d+].*?\[/size](.*))
(?=.{24,40}\1$)
.{0,39}t.*?(?=\1$)

New

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed condimentum velit a felis commodo, ac efficitur nunc [size=27]Hello World[/size] dictum. Fusce auctor, [size=30]This is a test[/size] sit amet hendrerit commodo, [size=59]The quick brown fox jumps over the lazy dog[/size] enim augue consectetur nulla, vel blandit magna est vel sapien. Nam [size=42]Lorem ipsum dolor sit amet[/size] mattis ligula eu [size=41]Happiness is a warm puppy[/size] condimentum rhoncus. [size=21]Short[/size] Interdum et malesuada fames ac ante ipsum primis in faucibus. Donec interdum, [size=50]Supercalifragilisticexpialidocious[/size] ut posuere sapien venenatis vel.

Substitution

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed condimentum velit a felis commodo, ac efficitur nunc [size=27]Hello World[/size] dictum. Fusce auctor, [size=30]This is a test[/size] sit amet hendrerit commodo, [size=59]The quick brown fox jumps over the lazy dog[/size] enim augue consectetur nulla, vel blandit magna est vel sapien. Nam [size=42]Lorem ipsum dolor sit amet[/size] mattis ligula eu [size=41]Happiness is a warm puppy[/size] condimentum rhoncus. [size=21]Short[/size] Interdum et malesuada fames ac ante ipsum primis in faucibus. Donec interdum, [size=50]Supercalifragilisticexpialidocious[/size] ut posuere sapien venenatis vel.