how to count length of arrays created dynamically? - php

Question

I have an array
dump($data);
*************************************
array(10) {
["12-male"] => string(1) "2"
["11-male"] => string(1) "2"
["10-female"] => string(1) "2"
["16-female"] => string(1) "2"
["9-male"] => string(1) "2"
["17-male"] => string(1) "4"
["14-male"] => string(1) "4"
["15-female"] => string(1) "4"
["13-female"] => string(1) "5"
["18-female"] => string(1) "6"
}
******************************************
I am DYNAMICALLY getting like sub arrays out of the array above
$rooms = array();
foreach ($data as $key => $value) {
$rooms['room'.$value][] = $key;
$rooms['room'.$value]['count'] = sizeof($rooms['room'.$value]);
}
dump($rooms);
******************************************
I get this result
Dump => array(4) {
["room2"] => array(6) { //array size=6
[0] => string(7) "12-male"
["count"] => int(6) //count of array size=6
[1] => string(7) "11-male"
[2] => string(9) "10-female"
[3] => string(9) "16-female"
[4] => string(6) "9-male"
}
["room4"] => array(4) { //array size=4
[0] => string(7) "17-male"
["count"] => int(4) //count of array size=4
[1] => string(7) "14-male"
[2] => string(9) "15-female"
}
["room5"] => array(2) { //array size=2
[0] => string(9) "13-female"
["count"] => int(1) //count of array size=1 (the problem here)
}
["room6"] => array(2) { //array size=2
[0] => string(9) "18-female"
["count"] => int(1) //count of array size=1 (the problem here)
}
}
My issue is that, the count is returned correctly after first 2 iterations, after that the count is always showing 1, no matter the size of array.
I tried count() as well but the result is the same.

Answer 1

You could do like below:
$rooms = array();
foreach ($data as $key => $value) {
if (!isset($rooms['room'.$value])) {
$rooms['room'.$value] = array('count' => 0);
}
$rooms['room'.$value][] = $key;
$rooms['room'.$value]['count']++;
}
But you don't need to add the count into your array.

Answer 2

The reason the count is doing that is that from room2 and room4 you are inserting 'count' on the first iteration, then on subsequent iterations 'count' is included in the sizeof() request. For room 5 and room6 as they are iterated only once sizeof() is only called once, before 'count' is inserted into the array, so it's not the index of 'count' not included in the result of sizeof for those items.