stream_supports_lock

(PHP 5 >= 5.3.0, PHP 7)

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