msg_queue_exists
(PHP 5 >= 5.3.0)
msg_queue_exists — Check whether a message queue exists
说明
$key
)
Checks whether the message queue key exists.
参数
-
key -
Queue key.
返回值
成功时返回 TRUE ， 或者在失败时返回 FALSE 。
参见
- 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
用户评论:
[#1] tkuschel at loytec dot com [2012-07-05 20:40:45]
Following code will do the job:
<?php
$key = 0;
while (true) {
echo $key,"...\r";
if (msg_queue_exists($key))
echo "\r",$key,'::Exists',"\n";
$key++;
}
?>
[#2] michael dot hajuu at gmail dot com [2011-03-09 05:01:49]
A simple script for checking what message queues are in use on a [presumably new] server environment.
Run with php-cli
<?php
$k = 0;
while (true) {
echo $key,"...\r";
if (msg_queue_exists($key))
echo "\r",$key,'::Exists',"\n";
$key++;
}
?>
[#3] jaredm [2009-12-10 16:31:59]
A workaround for those not yet running 5.3 on *nix:
<?php
function queue_exists($key) {
if(function_exists("msg_queue_exists")) {
return msg_queue_exists($key);
} else {
$aQueues = array();
exec("ipcs -q | grep \"^[0-9]\" | cut -d \" \" -f 1", $aQueues);
if(in_array($key,$aQueues)) return true;
else return false;
}
}
?>
Maybe a bit slow and kludgey, but it works.