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): 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。
add a note
User Contributed Notes 1 note
romain dot ardiet at gmail dot com ¶
7 years ago
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
备份地址：http://www.lvesu.com/blog/php/function.stream-supports-lock.php