Você procurou por: backslash (Coreano - Inglês)

the third use of backslash is for specifying generic charac- ter types:
notice that each of the assertions is applied independentlynotice that each of the assertions is applied independently at the same point in the subject string.

if pcre_extra is set, a backslash followed by a letter with no special meaning is faulted.
in addition, inside a character class, the sequence "\b" is interpreted as the backspace character (hex 08).

참조자를 교체하려면 \\ (backslash) 대신 $ (dollar) 기호를 사용하십시오. 검색된 모든 문자열을 교체하려면 $0을 사용하십시오.
use $ (dollar) instead of \\ (backslash) to replace references. use $0 to replace the whole found string.

2. i need to convert all single-quotes (') to a backslash followed by a single-quote. how can i do this with a regular expression?
how can i do this with a regular expression?

a second use of backslash provides a way of encoding non- printing characters in patterns in a visible manner. there is no restriction on the appearance of non-printing characters, apart from the binary zero that terminates a pattern, but when a pattern is being prepared by text editing, it is usually easier to use one of the following escape sequences than the binary character it represents:
as a convenient shorthand, if any option settings are required at the start of a non-capturing subpattern, theas a convenient shorthand, if any option settings are required at the start of a non-capturing subpattern, the option letters may appear between the "?" and the ":".