Looping through multidimensional array in php - php

Question

Please refer to array below. What I would like to do is to get the total of the values of index zero under 21 and 23 divided by the number of zeros. It is like getting their average.
Array
(
[21] => Array
(
[0] => 3.5
[65] => Array
(
[0] => 44.125
)
[150] => Array
(
[0] => 15.25
)
[151] => Array
(
[0] => 17.333333333333
)
)
[23] => Array
(
[0] => 0
[166] => Array
(
[0] => 26
)
[172] => Array
(
[0] =>
)
[182] => Array
(
[0] => 20.333333333333
)
[183] => Array
(
[0] => 24.125
)
)
)
Then format it to this
Array
(
[21] => Array
(
[0] => Average for 21
[65] => Array
(
[0] => 44.125
)
[150] => Array
(
[0] => 15.25
)
[151] => Array
(
[0] => 17.333333333333
)
)
[23] => Array
(
[0] => Average for 23
[166] => Array
(
[0] => 26
)
[172] => Array
(
[0] =>
)
[182] => Array
(
[0] => 20.333333333333
)
[183] => Array
(
[0] => 24.125
)
)
)
Thanks in advance to those who can help! :)
Note: This is just a sample structure of the array. It's possible that the children of 21 and 23 can have another children, meaning, another nodes. Example:
[65] => Array
(
[0] => 44.125
[x] => Array
(
[0]=> 121.11
)
)
I believe a recursive function is needed on this one.

Answer 1

try this, I think this is what you want
$count1 = 0;$sum=0;
$count2 = 0;$sum2=0;
foreach ($array as $key3 => $value3)
{
if($key3 == "21")
{
foreach ($value3 as $key => $value)
{
if (strpos($key, '0') === 0) {
$count1++;$sum=$sum+$value;
}
if(is_array($value))
{
foreach($value as $key2=>$value2)
{
if(strpos($key2,'0') === 0)
{
$count1++ ;$sum=$sum+$value2;
}
}
}
}
}
if($key3 == "23")
{
foreach ($value3 as $key => $value)
{
if (strpos($key, '0') === 0) {
$count2++;$sum2=$sum2+$value;
}
if(is_array($value))
{
foreach($value as $key2=>$value2)
{
if(strpos($key2,'0') === 0)
{
$count2++; $sum2=$sum2+$value2;
}
}
}
}
}
}
$array[21][0] = ($sum/$count1);
$array[23][0] = ($sum2/$count2);
Demo