streamWrapper::stream_flush
streamWrapper::stream_metadata
streamWrapper
PHP Manual

# streamWrapper::stream_lock

(PHP 5)

streamWrapper::stream_lock — Advisory file locking

### Opis

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`).

### Parametry

`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)

### Zwracane wartości

Zwraca `TRUE` w przypadku powodzenia, `FALSE` w przypadku błędu.

### Błędy/Wyjątki

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

### Zobacz też:

- stream_set_blocking() - Set blocking/non-blocking mode on a stream
- flock() - Portable advisory file locking

streamWrapper::stream_flush
streamWrapper::stream_metadata
streamWrapper
PHP Manual