stream_supports_lock
(PHP 5 >= 5.3.0, PHP 7)
stream_supports_lock — Tells whether the stream supports locking
说明
stream_supports_lock
( resource
$stream
) : boolTells 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。