PHP: put array entries in new order - php

Question

I try to take the following array:
Array
(
[0] => Array
(
[1] => 12
[2] => 21
[3] => 33
)
[1] => Array
(
[1] => 5
[2] => 5
[3] => 4
)
[2] => Array
(
[1] => 1
[2] => 10
[3] => 11
)
[3] => Array
(
[3] => 2
)
)
and create a new array with it, taking the first entries of the source array. So the first array from this one would look like this:
Array
(
[0] => 12
[1] => 5
[2] => 1
[3] => 2
)
And the second one obviously like this:
Array
(
[0] => 21
[1] => 5
[2] => 10
)
I tried around with 2 for loops, it somewhat works with
for ($i = 1; $i < count($month_array[$i]) + 1; $i++)
{
unset($temp_array);
for ($i2 = 0; $i2 < count($month_array); $i2++)
{
if (isset($month_array[$i2][$i]))
{
$temp_array[] = $month_array[$i2][$i];
}
}
}
But it leaves out some of the elements and if the source array is not complete, meaning only the 3rd array has a value for key 3, it also fails.
Any help ? Many thanks !

Answer 1

Try it like this:
$org_array = array(array(1 => 12,2 => 21,3 => 33),array(1 => 5,2 => 5,3 => 4),array(1 => 1,2 => 10,3 => 11),array(3 => 2),); // your original array
$new_array = array(); // the output array
foreach($org_array as $sub_org_value) { // for each sub array of your original array do this
foreach($sub_org_value as $key => $value) { // for each entry in a sub array do this
$new_array[$key][] = $value; // add the entry into the new_array in the right sub array
}
}
print_r($new_array[1]); // yields 12,5,1
print_r($new_array[2]); // yields 21,5,10
print_r($new_array[3]); // yields 33,4,11,2
Afterwards you have an array $new_array that contains three arrays. The first sub array has all 1 values, the second sub array has all 2 values and the third sub array has all 3 values.