Flatten RecursiveIteratorIterator array by children - php

Question

I can't seem to figure out the best way to do this. I have a RecursiveIteratorIterator.
$info = new RecursiveIteratorIterator(
new GroupIterator($X), # This is a class that implements RecursiveIterator
RecursiveIteratorIterator::SELF_FIRST
);
Note: GroupIterator is a class that handles our custom formatted data
When I loop through it, I get exactly what I expect.
foreach($info as $data){
echo $info->getDepth().'-'.$data."\n";
}
The output is:
0-a
1-b
2-c
2-d
1-e
2-f
0-g
1-h
2-i
This is correct, so far. Now, what I want is to flatten the parents and children into a single array. I want one row for each max-depth child. The output I am trying to get is:
0-a 1-b 2-c
0-a 1-b 2-d
0-a 1-e 2-f
0-g 1-h 2-i
I can't figure out how to do this. Each iteration over the loop gives me another row, how can I combine the rows together that I want?

Answer 1

I managed to figure it out. #ComFreek pointed me in the right direction. Instead of using a counter, I used the current depth to check when I hit the lowest child, then I added the data to the final array, otherwise I added it to a temp array.
$finalArray = array();
$maxDepth = 2;
foreach($info as $data){
$currentDepth = $info->getDepth();
// Reset values for next parent
if($currentDepth === 0){
$currentRow = array();
}
// Add values for this depth
$currentRow[$currentDepth] = $data;
// When at lowest child, add to final array
if($currentDepth === $maxDepth){
$finalArray[] = $currentRow;
}
}

Answer 2

Try adding a counter variable:
// rowNr loops through 0, 1, 2
$rowNr = 0;
$curData = [];
$outputData = [];
foreach($info as $data){
// got last element, add the temp data to the actual array
// and reset temp array and counter
if ($rowNr == 2) {
$outputData[] = $curData;
$curData = [];
$rowNr == 0;
}
else {
// save temp data
$curData[] = $info->getDepth() . '-' . $data;
}
$rowNr++;
}