PHP convert json into csv with sub array - php

Question

I was creating php code to convert the below json to csv
Array
(
[data] => Array
(
[0] => Array
(
[DESC] => bla bal bal
[SOLD] => 0
[contact_no] => 1234
[title] => Hiiiii
[price] => 10900
[big_image] => Array
(
[0] => http://example.com/images/user_adv/14.jpg
[1] => http://example.com/images/user_adv/15.jpg
)
[small_image] => Array
(
[0] => http://example.com/images/user_adv/small/14.jpg
[1] => http://example.com/images/user_adv/small/15.jpg
)
[tpe] => user
)
[1] => Array
(
[DESC] => fo fo fof ofof
[SOLD] => 0
[contact_no] => 234522
[title] => Hellooooo sddf
[price] => 0
[big_image] => Array
(
[0] => http://example.com/images/user_adv/154.jpg
[1] => http://example.com/images/user_adv/144.jpg
[2] => http://example.com/images/user_adv/147.jpg
)
[small_image] => Array
(
[0] => http://example.com/images/user_adv/small/154.jpg
[1] => http://example.com/images/user_adv/small/144.jpg
[2] => http://example.com/images/user_adv/small/147.jpg
)
[tpe] => user
)
)
[pis] => 3
[totals] => 23
[curpage] => 1
[total_ads] => 71
)
I've been using the below code to export it to .csv
$fp = fopen("output.csv","w");
foreach ($json['data'] as $fields) {
fputcsv($fp, $fields);
}
fclose($fp);
I can convert it fine, but I face a small issue that the sub array which is big_image & small_image is NOT appearing in the output file .csv (the row is empty)
[big_image] => Array
(
[0] => http://example.com/images/user_adv/154.jpg
[1] => http://example.com/images/user_adv/144.jpg
[2] => http://example.com/images/user_adv/147.jpg
)
[small_image] => Array
(
[0] => http://example.com/images/user_adv/small/154.jpg
[1] => http://example.com/images/user_adv/small/144.jpg
[2] => http://example.com/images/user_adv/small/147.jpg
)
By the way, if I replace:
foreach ($json['data'] as $fields) {
with
foreach ($json['data'][0] as $fields) {
I get the link pictures as output, so I need to merge them as one output
foreach ($json['data'] as $fields) {
foreach ($json['data'][0] as $fields2) {
edit :
here the output
edit 2 :
i expect the output something like that

Answer 1

You could make a function to make sure those nested arrays are made flat. You can create a utility function for that, like this:
function array_flatten ($nonFlat) {
$flat = array();
foreach (new RecursiveIteratorIterator(
new RecursiveArrayIterator($nonFlat)) as $k=>$v) {
$flat[$k] = $v;
}
return $flat;
}
And call it like this:
$fp = fopen("output.csv","w");
foreach ($json['data'] as $fields) {
fputcsv($fp, array_flatten($fields));
}
fclose($fp);