The suggestion that you should free the lock as soon as possible is WRONG (and for some reason, I can't downvote it right now).
Releasing the lock before the write() call is as effective as not using locks at all. The whole point is that a concurrent read() HAS to be blocked until the session is closed, otherwise you'll have race conditions.
If you care about the performance aspect, you should take care to call session_write_close() as soon as possible instead.
SessionHandlerInterface::open
(PHP 5 >= 5.4.0, PHP 7)
SessionHandlerInterface::open — Initialize session
설명
abstract public bool SessionHandlerInterface::open
( string
$save_path
, string $session_name
)Re-initialize existing session, or creates a new one. Called when a session starts or when session_start() is invoked.
인수
-
save_path -
The path where to store/retrieve the session.
-
session_name -
The session name.
반환값
반환 값(보통 성공 시 TRUE, 실패 시 FALSE). 이 값은 처리를 위해 내부적으로 PHP로 반환되는 점에 주의하십시오.
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User Contributed Notes 2 notes
narf at devilix dot net ¶
10 years ago
tony at marston-home dot demon dot co dot uk ¶
6 years ago
Note that once $sessionName has been used to provide a value for $sessionId from the cookie data it is totally redundant as all further reading and writing of the session data is controlled by $sessionId.
If, for any reason, it becomes necessary to identify the value for $sessionName which is associated with the current $sessionId then you should use the value that was passed on the open() method. Attempting to use a value from an alternative source could have unexpected side effects.
