regexp-php-reference-php-dot-8

  • PCRE regex
    syntax
  • Dot

  • Dot
  • Dot

    Dot

    Outside a character class, a dot in the pattern
    matches any one character in the subject, including a non-printing
    character, but not (by default) newline. If the PCRE_DOTALL option is set, then dots match newlines as
    well. The handling of dot is entirely independent of the handling
    of circumflex and dollar, the only relationship being that they
    both involve newline characters. Dot has no special meaning in a
    character class.

    \C can be used to match
    single byte. It makes sense in UTF-8 mode
    where full stop matches the whole character which can consist of
    multiple bytes.