If encoding is set, then
성공 시 TRUE를, 실패 시 FALSE를 반환합니다.
In this case, the internal character encoding is NOT changed.
If encoding is omitted, then
the current character encoding name for a multibyte regex is returned.
변경점
버전
설명
5.6.0
Default encoding is changed to UTF-8. It was EUC-JP Previously.