PHPWales 2020 - June 3rd to June 4th

msg_queue_exists

(PHP 5 >= 5.3.0, PHP 7)

msg_queue_existsVerificar si una cola de mensajes existe

Descripción

msg_queue_exists ( int $key ) : bool

Verifica si la clave dada por el parámetro key de la cola de mensajes existe.

Parámetros

key

La clave de la cola.

Valores devueltos

Devuelve TRUE en caso de éxito o FALSE en caso de error.

Ver también

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User Contributed Notes 4 notes

up
1
michael dot hajuu at gmail dot com
8 years ago
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++;
}
?>
up
0
klatovsky at 2u2 dot cz
1 year ago
This function is creating new queue (and returning true) if you set NULL into $key variable.

<?php

$isQueueCreated
= msg_queue_exists(NULL);
print
$isQueueCreated ? "WTF??!" : "ok, everything is fine..";

?>

WTF??!

# ipcs -q
0x00000000 173047808  root       0        0            0
up
0
jaredm
10 years ago
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.
up
-2
tkuschel at loytec dot com
7 years ago
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++;
}
?>
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