• PCRE regex
  • Comments

  • Comments
  • Comments


    The sequence (?# marks the start of a comment which
    continues up to the next closing parenthesis. Nested parentheses
    are not permitted. The characters that make up a comment play no
    part in the pattern matching at all.

    If the PCRE_EXTENDED option is set, an unescaped # character
    outside a character class introduces a comment that continues up to
    the next newline character in the pattern.