Datastream Array Returning Only First Value - php

Question

I am using the MODX cms to output data from a third party, and I am stumped on how to return a nested array, currently I am only getting it to return the first array or NULL. Here is a sample of the code I am using:
$datastream = '[{"id":57,
"offer_info":{"offer_headline":"Main Offer Headline",
"published_title":"Displayed Main Title"},
// My issue is here with the nested array
"service_categories":[{"service_category_code":"D",
"headline":"My Headline for D",
"midline":"Middle copy",
"footline":"Footer copy for D"},
{"service_category_code":"T",
"headline":"My Headline for T",
"image":"image.svg",
"footline":"Footer copy for T"}]}]';
$output_json = json_decode($datastream);
$output_json = json_decode($datastream, true); // this returns null for everything
foreach($output_json as $component) {
$productid = $component->id; // this returns ok
$offer_headline = $component->offer_info->offer_headline; // this returns ok
$published_title = $component->offer_info->published_title; // this returns ok
$service_categories_category_code = $component->service_categories[0]->service_category_code; // this only returns first value
$service_categories_category_code = $component->service_categories->service_category_code; // this returns NULL
var_dump($service_categories_category_code);
I am able to take the values that return ok and place them in my code, but the nested array is only returning the first value, and I'm not sure if I am doing this correctly:
if ($service_categories_category_code = "D") {
$d_details_headline = $component->service_categories[0]->headline;
$d_details_midline = $component->service_categories[0]->midline;
$d_footline = $component->service_categories[0]->footline;
} elseif ($service_categories_category_code = "T") {
$t_details_headline = $component->service_categories[0]->headline;
$t_details_image = $component->service_categories[0]->image;
$t_details_footline = $component->service_categories[0]->footline;
};
Thank you very much in advance for any help

Answer 1

Hope this helps You :
<?php
$datastream = '[{"id":57,"offer_info":{"offer_headline":"Main Offer
Headline","published_title":"Displayed Main
Title"},"service_categories":[{"service_category_code":"D",
"headline":"My Headline for D","midline":"Middle
copy","footline":"Footer copy for D"},{"service_category_code":"T",
"headline":"My Headline for T",
"image":"image.svg",
"footline":"Footer copy for T"}]}]';
$output_json = json_decode($datastream);
//$output_json = json_decode($datastream, true); // this returns null for everything
$data = array();
foreach($output_json as $component) {
$productid = $component->id; // this returns ok
$offer_headline = $component->offer_info->offer_headline; // this returns ok
$published_title = $component->offer_info->published_title; // this returns ok
$data['productid'] = $component->id;
$data['offer_info']['offer_headline'] = $component->offer_info->offer_headline;
$data['offer_info']['published_title'] = $component->offer_info->published_title;
foreach ($component->service_categories as $comp) {
if ($comp->service_category_code == 'D') {
$data['D']['service_category_code'] = $comp->service_category_code;
$data['D']['headline'] = $comp->headline;
$data['D']['midline'] = $comp->midline;
$data['D']['footline'] = $comp->footline;
} elseif ($comp->service_category_code == 'T') {
$data['T']['service_category_code'] = $comp->service_category_code;
$data['T']['headline'] = $comp->headline;
$data['T']['image'] = $comp->headline;
$data['T']['footline'] = $comp->footline;
}
}
print_r($data);
}