# 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

### 说明

msg_stat_queue(SysvMessageQueue `$queue`): array|false

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.

### 参数

`queue`

  The message queue.

### 返回值

On success, the return value is an array whose keys and values have the following meanings:

Array structure for msg_stat_queue
`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.

### 更新日志

版本 | 说明
--- | ---
8.0.0 | `queue` expects a SysvMessageQueue instance now; previously, a resource was expected.

### 参见

- 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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