regex101: mb_wordwrap

Non-Capturing Group(?:((?>.{1,48}(?:(?<=[^\S\r\n])[^\S\r\n]?|(?=\r?\n)|$|[^\S\r\n]))|.{1,48})(?:\r?\n)?|(?:\r?\n|$))

1st Alternative((?>.{1,48}(?:(?<=[^\S\r\n])[^\S\r\n]?|(?=\r?\n)|$|[^\S\r\n]))|.{1,48})(?:\r?\n)?

Group 1((?>.{1,48}(?:(?<=[^\S\r\n])[^\S\r\n]?|(?=\r?\n)|$|[^\S\r\n]))|.{1,48})

1st Alternative(?>.{1,48}(?:(?<=[^\S\r\n])[^\S\r\n]?|(?=\r?\n)|$|[^\S\r\n]))

Atomic Group(?>.{1,48}(?:(?<=[^\S\r\n])[^\S\r\n]?|(?=\r?\n)|$|[^\S\r\n]))

.{1,48}any character (except for line terminators), repeated between 1 and 48 times

Non-Capturing Group(?:(?<=[^\S\r\n])[^\S\r\n]?|(?=\r?\n)|$|[^\S\r\n])

1st Alternative(?<=[^\S\r\n])[^\S\r\n]?

Positive Lookbehind(?<=[^\S\r\n])

Negated Character Class[^\S\r\n]

\Sany non-whitespace character

\ra carriage return (ASCII 13)

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

Negated Character Class[^\S\r\n]?

?matches at most one character outside the set below:

\Sany non-whitespace character

\ra carriage return (ASCII 13)

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

2nd Alternative(?=\r?\n)

Positive Lookahead(?=\r?\n)

\r?optionally matches a carriage return (ASCII 13)

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

3rd Alternative$

$end of string, or before its final line terminator

4th Alternative[^\S\r\n]

Negated Character Class[^\S\r\n]

\Sany non-whitespace character

\ra carriage return (ASCII 13)

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

2nd Alternative.{1,48}

.{1,48}any character (except for line terminators), repeated between 1 and 48 times

Non-Capturing Group(?:\r?\n)?

?repeats the group contents below at most once:

\r?optionally matches a carriage return (ASCII 13)

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

2nd Alternative(?:\r?\n|$)

Non-Capturing Group(?:\r?\n|$)

1st Alternative\r?\n

\r?optionally matches a carriage return (ASCII 13)

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

2nd Alternative$

$end of string, or before its final line terminator

Global pattern flags

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

Search reference

Regular Expression

(?:((?>.{1,48}(?:(?<=[^\S\r\n])[^\S\r\n]?|(?=\r?\n)|$|[^\S\r\n]))|.{1,48})(?:\r?\n)?|(?:\r?\n|$))

Test String
New

----+----1----+----2----+----3----+----4----+--8 *** Fonte tipo A com Página de Código pc850: À noite, vovô Kowalsky vê o ímã cair no pé do pingüim quêixoso e vovó põe açúcar no chá de tâmaras do jabuti feliz. ÁÉÍÓÚáéíóúçÇãõÃÕÊêÂâÔôÀà

Substitution
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$1\n

Regular Expression

Test StringNew

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Test String
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Substitution
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