Php/docs/function.stream-supports-lock

• PHP Manual
• Stream 函数
• Tells whether the stream supports locking

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 ) : bool

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