PHP Manual
Semaphore Functions
Check whether a message queue exists

msg_queue_exists

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

msg_queue_exists — Check whether a message queue exists

Description

msg_queue_exists(int $key): bool

Checks whether the message queue key exists.

Parameters

key: Queue key.

Return Values

Returns true on success or false on failure.

See Also

msg_remove_queue() - Destroy a message queue
msg_receive() - Receive a message from a message queue
msg_stat_queue() - Returns information from the message queue data structure