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

用户评论:

[#1] romain dot ardiet at gmail dot com [2014-10-23 20:54:59]

This method returns TRUE on custom wrappers by default if you don't implement the stream_lock() method inside the wrapper : http://php.net/manual/en/streamwrapper.stream-lock.php

[#2] derkontrollfreak+9hy5l at gmail dot com [2014-08-24 21:09:20]

stream_supports_lock() always returns TRUE on custom wrappers.