regex101: PCRE2 (PHP) Match Workspace

1st Alternative(?:^\d+.*\R)?(?:4-Diepi|5-Mts|.*\b(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\d{4}\b.*)$(*SKIP)(*F)

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

?repeats the group contents below at most once:

^start of line

\d+a digit, repeated at least once

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

\Ra newline sequence

Non-Capturing Group(?:4-Diepi|5-Mts|.*\b(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\d{4}\b.*)

1st Alternative4-Diepi

4-Diepithe literal text 4-Diepi (case sensitive)

2nd Alternative5-Mts

5-Mtsthe literal text 5-Mts (case sensitive)

3rd Alternative.*\b(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\d{4}\b.*

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

\ban ASCII word boundary

Non-Capturing Group(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)

1st AlternativeJan

Janthe literal text Jan (case sensitive)

2nd AlternativeFeb

Febthe literal text Feb (case sensitive)

3rd AlternativeMar

Marthe literal text Mar (case sensitive)

4th AlternativeApr

Aprthe literal text Apr (case sensitive)

5th AlternativeMay

Maythe literal text May (case sensitive)

6th AlternativeJun

Junthe literal text Jun (case sensitive)

7th AlternativeJul

Julthe literal text Jul (case sensitive)

8th AlternativeAug

Augthe literal text Aug (case sensitive)

9th AlternativeSep

Septhe literal text Sep (case sensitive)

10th AlternativeOct

Octthe literal text Oct (case sensitive)

11th AlternativeNov

Novthe literal text Nov (case sensitive)

12th AlternativeDec

Decthe literal text Dec (case sensitive)

\d{4}a digit, repeated exactly 4 times

\ban ASCII word boundary

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

$end of line

(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character

(*F)forces the current match attempt to fail at this position

2nd Alternative^\d+.*\R(\d+.*)$

^start of line

\d+a digit, repeated at least once

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

\Ra newline sequence

Group 1(\d+.*)

\d+a digit, repeated at least once

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

$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

Search reference

Regular Expression

(?:^\d+.*\R)?(?:4-Diepi|5-Mts|.*\b(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\d{4}\b.*)$(*SKIP)(*F)|^\d+.*\R(\d+.*)$

Unit Tests

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