streamWrapper::stream_flushstreamWrapper::stream_lock
(PHP 5)
streamWrapper::stream_lock — Advisory file locking
설명
public bool streamWrapper::stream_lock
( mode $operation
)
This method is called in response to flock(), when file_put_contents() (when flags contains LOCK_EX), stream_set_blocking() and when closing the stream (LOCK_UN).
인수
- operation
-
operation is one of the following:
- LOCK_SH to acquire a shared lock (reader).
- LOCK_EX to acquire an exclusive lock (writer).
- LOCK_UN to release a lock (shared or exclusive).
- LOCK_NB if you don't want flock() to block while locking. (not supported on Windows)
반환값
성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다.
오류/예외
Emits E_WARNING if call to this method fails (i.e. not implemented).
참고
- stream_set_blocking() - Set blocking/non-blocking mode on a stream
- flock() - Portable advisory file locking
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streamWrapper::stream_lock
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