A line terminator is a one- or two-character sequence that marks the end of a line of the input character sequence. The following are recognized as line terminators:
\n
'),
\r\n
"),
\r
'),
\u0085
'),
\u2028
'), or
\u2029
').
If UNIX_LINES mode is activated, then the only line terminators recognized are newline characters.
The regular expression .
matches any character except a line terminator
unless the DOTALL flag is specified.
By default, the regular expressions ^
and $
ignore line
terminators and only match at the beginning and the end, respectively, of the entire
input
sequence. If MULTILINE mode is activated then ^
matches at the beginning of input
and after any line terminator except at the end of input. When in MULTILINE mode $
matches just before a line terminator or the end of
the input sequence.