How to Match Newlines in PHP Regex Without Using [\\r\\n]?

How to Avoid Using [rn] for Matching Newlines in PHP Regex

When attempting to match carriage returns (r) and newlines (n) using v (vertical whitespace), programmers often encounter limitations. To overcome this issue, alternative methods are available that provide greater flexibility.

Unicode Newline Matching

• R: Matches any Unicode newline sequence within the ASCII range (by default).
• R with u (unicode) Flag: Expands the range to include non-ASCII newline characters, line separators, and paragraph separators.

Specific Newline Matching

• (*CR): Matches carriage returns only.
• (*LF): Matches linefeeds only.
• (*CRLF): Matches both carriage returns and linefeeds.
• (*ANYCRLF): Matches any of the above (carriage returns, linefeeds, or both).

Other Considerations

• R does not have special meaning within character classes, and is treated as the literal character "R".
• Five different conventions for indicating line breaks are supported, allowing for flexibility in matching different newline styles.

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