shmop_close doesn't delete the memory segment, it just detaches from it.
If you have created the block and need to delete it you must call shmop_delete **BEFORE** calling shmop_close (for reasons outlined in shmop_delete help page notes).
(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
shmop_close — Close shared memory block
本函数已自 PHP 8.0.0 起被废弃。强烈建议不要依赖本函数。
注意:
此函数无效。在 PHP 8.0.0 之前，用于关闭资源。
shmop_close() is used to close a shared memory block.
没有返回值。
示例 #1 Closing shared memory block
<?php
shmop_close($shm_id);
?>
This example will close shared memory block identified by $shm_id.
shmop_close doesn't delete the memory segment, it just detaches from it.
If you have created the block and need to delete it you must call shmop_delete **BEFORE** calling shmop_close (for reasons outlined in shmop_delete help page notes).As explained on this page, PHP 8.0.0 expects a Shmop instance instead of a resource. According to bug #81098 this change means that the Shmop closes itself when the script completes so there is no need to close it with shmop_close.
Using function_exists('shmop_close') will return true but calling shmop_close will throw a deprecation error.
The documentation explains the change in 8.0.0 expects the expected argument changed without mentioning it'll just throw a deprecation error.