regex101: PCRE2 (PHP) Match Workspace

^start of line

==the literal text ==

\h*any horizontal whitespace character, repeated any number of times

Upgrade Noticethe literal text Upgrade Notice (case sensitive)

\h*any horizontal whitespace character, repeated any number of times

==the literal text ==

Non-Capturing Group(?:(?:\R(?!=\h*\d+\.\d+\.\d+\h*=$).*)*\R=\h*(\d+\.\d+\.\d+)\h*=$\s*){2}

{2}repeats the group contents below exactly 2 times:

Non-Capturing Group(?:\R(?!=\h*\d+\.\d+\.\d+\h*=$).*)*

*repeats the group contents below any number of times:

\Ra newline sequence

Negative Lookahead(?!=\h*\d+\.\d+\.\d+\h*=$)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\h*any horizontal whitespace character, repeated any number of times

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

\h*any horizontal whitespace character, repeated any number of times

=the literal = (61₁₀ / 75₈ / 3D₁₆)

$end of line

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

\Ra newline sequence

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\h*any horizontal whitespace character, repeated any number of times

Group 1(\d+\.\d+\.\d+)

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

\h*any horizontal whitespace character, repeated any number of times

=the literal = (61₁₀ / 75₈ / 3D₁₆)

$end of line

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

Group 2(^\h*\S.*(?:\R\h*\S.*)+)

^start of line

\h*any horizontal whitespace character, repeated any number of times

\Sany non-whitespace character

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

Non-Capturing Group(?:\R\h*\S.*)+

+repeats the group contents below at least once:

\Ra newline sequence

\h*any horizontal whitespace character, repeated any number of times

\Sany non-whitespace character

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

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

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

Search reference

Regular Expression

^==\h*Upgrade Notice\h*==(?:(?:\R(?!=\h*\d+\.\d+\.\d+\h*=$).*)*\R=\h*(\d+\.\d+\.\d+)\h*=$\s*){2}(^\h*\S.*(?:\R\h*\S.*)+)

Unit Tests

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