stream_supports_lock
(PHP 5 >= 5.3.0)
stream_supports_lock — Tells whether the stream supports locking.
说明
bool stream_supports_lock ( resource $stream )Tells whether the stream supports locking through flock().
参数
- stream
-
The stream to check.
返回值
成功时返回 TRUE, 或者在失败时返回 FALSE.
参见
- flock() - 轻便的咨询文件锁定