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stream_supports_lock

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

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