regex101: PCRE2 (PHP) Match Workspace

Comment: The pattern should match twice or more.

Non-Capturing Group(?: # Begin of line. ^ # But not one of these lines: (?!(?:4-Diepi|5-Mts|.*\b(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\d{4}\b.*)$) # Digits and then any chars not beeing line ending, followed by a new line or end of line. \d+[^\r\n]*(\R|$) ){2,}

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

Comment: Begin of line.

^start of line

Comment: But not one of these lines:

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

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

Comment: Digits and then any chars not beeing line ending, followed by a new line or end of line.

\d+a digit, repeated at least once

Negated Character Class[^\r\n]*

*matches any number of characters outside the set below:

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Group 1(\R|$)

1st Alternative\R

\Ra newline sequence

2nd Alternative$

$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

Search reference

Regular Expression

# The pattern should match twice or more.
(?:
  # Begin of line.
  ^
  # But not one of these lines:
  (?!(?:4-Diepi|5-Mts|.*\b(?:Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\d{4}\b.*)$)
  # Digits and then any chars not beeing line ending, followed by a new line or end of line.
  \d+[^\r\n]*(\R|$)
){2,}

Unit Tests

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