Counting entries in sub/subarray - php

Question

I am working on a chat.
I have an array that contains the info regarding the room
(in the example below, 2 rooms (the lounge, the beach)).
I have an issue when I have an empty room (in the example the beach), as it contains by default no user, (which is a Null user).
$roomNusers=Array (
[The Lounge] =>
Array ( [id] => 1
[privacy] => public
[users] => Array
[QUICHE POIREAU] => Array
[smiley] => smi_smile.gif
[name] => QUICHE POIREAU
[state] => NULL
[id] => 1 )
[JOHN DOE] => Array
[smiley] => smi_smile.gif
[name] => Joe FRANC
[state] =>
[id] => 40 )
[The Beach] => Array
[id] => 2
[privacy] => public
[users] => Array
[Null] => Array
[smiley] => Null
[name] => Null
[state] => Null
[id] => Null
I am trying to count, in my array, the number of users currently present in the room.
Looking around Stack Overflow, I managed to find the solution I wanted:
foreach($roomNusers as $room => $value)
{
echo $room.' user count:'.count($room['users'])
}
This output:
The lounge user count: 2
The beach user count: 1
My issue is that it counts the user [null] in the beach.
How can I count the number of users not null per room?
I thought of a workaround with something similar to:
$countperroom= .count($room['users'])-1;
if(isset(end([$room]['users']))){$countuser+1;}
In this, the last user is empty, I do not add an user, but I do not know how to write this.

Answer 1

Rather than counting the number of values in $room['users'], you could count the number of keys after filtering them to remove empty keys:
foreach ($rooms as $name => $room) {
$users = count(array_filter(array_keys($room['users'])));
echo "$name: $users users\n";
}
Output (for your sample data):
The Lounge: 2 users
The Beach: 0 users
Demo on 3v4l.org