msg_stat_queue
(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
msg_stat_queue — Returns information from the message queue data structure
Description
msg_stat_queue() returns the message queue meta data
for the message queue specified by the queue.
This is useful, for example, to determine which process sent the message
that was just received.
Parameters
-
queue -
The message queue.
Return Values
On success, the return value is an array whose keys and values have the following meanings:
msg_perm.uid |
The uid of the owner of the queue. |
msg_perm.gid |
The gid of the owner of the queue. |
msg_perm.mode |
The file access mode of the queue. |
msg_stime |
The time that the last message was sent to the queue. |
msg_rtime |
The time that the last message was received from the queue. |
msg_ctime |
The time that the queue was last changed. |
msg_qnum |
The number of messages waiting to be read from the queue. |
msg_qbytes |
The maximum number of bytes allowed in one message queue. On Linux, this value may be read and modified via /proc/sys/kernel/msgmnb. |
msg_lspid |
The pid of the process that sent the last message to the queue. |
msg_lrpid |
The pid of the process that received the last message from the queue. |
Returns false on failure.
Changelog
| Version | Description |
|---|---|
| 8.0.0 |
queue expects a SysvMessageQueue
instance now; previously, a resource was expected.
|
See Also
- msg_remove_queue() - Destroy a message queue
- msg_receive() - Receive a message from a message queue
- msg_get_queue() - Create or attach to a message queue
- msg_set_queue() - Set information in the message queue data structure
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