Add new columns for CSV file - php

Question

I have tree arrays with different lengths, and I want to display each array in a column of my csv file. That's the php script file I am using but no success; I got the data duplicated.
The attempt I tried was to feed empty cells with an empty string so that I can have 3 columns with the same lengths.
$categories = get_categories( $args );
$categories_level_1 = array();
$categories_level_2 = array();
$categories_level_3 = array();
foreach ($categories as $cat ) {
$cat_level =count( get_ancestors($cat->term_id, 'category') );
if($cat_level == 0){
$categories_level_1[] = $cat;
}else{
if($cat_level == 1){
$categories_level_2[] = $cat;
}elseif($cat_level == 2){
$categories_level_3[] = $cat;
}
}
}
fputcsv($file, array(utf8_decode('Catégories level 1')));
$i=0;
foreach ($categories_level_1 as $category) {
$i++;
$categorie_name = array(rw_mb_convert_encoding($category->name));
fputcsv($file, $categorie_name );
print_flush("\n liine created");
}
while( $i < count($categories_level_2)){
$i++;
fputcsv($file, array(" "));
print_flush("\n liine vide created");
}
fclose($file);
$newCsvData = array();
foreach ($categories_level_2 as $cat) {
if (($handle = fopen($csv_file_path, "r")) !== FALSE) {
while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
$data[] = rw_mb_convert_encoding($cat->name);
$newCsvData[] = $data;
}
fclose($handle);
}
}
$handle = fopen($csv_file_path, 'w');
foreach ($newCsvData as $line) {
fputcsv($handle, $line);
}
fclose($handle);
I should get my columns with the folowwing structure :
But in reality that's the result I got :