streamWrapper::stream_lock

(PHP 5, PHP 7)

streamWrapper::stream_lock — Advisory file locking

说锟斤拷

public streamWrapper::stream_lock ( int $operation ) : bool

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).

锟斤拷锟斤拷

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)

锟斤拷锟斤拷值

锟缴癸拷时锟斤拷锟斤拷 TRUE锟斤拷 锟斤拷锟斤拷锟斤拷失锟斤拷时锟斤拷锟斤拷 FALSE锟斤拷

锟斤拷锟斤拷锟届常

Emits E_WARNING if call to this method fails (i.e. not implemented).

锟轿硷拷

  • stream_set_blocking() - 为锟斤拷源锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷模式
  • flock() - 锟斤拷锟斤拷锟斤拷询锟侥硷拷锟斤拷锟斤拷