Acessing specific key/values in nested array in each iteration - php

Question

I am only interested in keys class and score and their values in my nested array. How can I only get these keys values to be printed out?
This is my $result array.
{ "images": [ { "classifiers": [ { "classifier_id": "default", "name": "default", "classes": [ { "class": "banana", "score": 0.562, "type_hierarchy": "/fruit/banana" }, { "class": "fruit", "score": 0.788 }, { "class": "diet (food)", "score": 0.528, "type_hierarchy": "/food/diet (food)" }, { "class": "food", "score": 0.528 }, { "class": "honeydew", "score": 0.5, "type_hierarchy": "/fruit/melon/honeydew" }, { "class": "melon", "score": 0.501 }, { "class": "olive color", "score": 0.973 }, { "class": "lemon yellow color", "score": 0.789 } ] } ], "image": "fruitbowl.jpg" } ], "images_processed": 1, "custom_classes": 0}
And this is my code logic.
foreach($result as $imgage => $classifier)
{
foreach($classifier["classes"] as $clas)
{
foreach($clas as $key => $value)
{
echo $key . ": " . $value;
}
}
}

Answer 1

This should work for you,
<?php
$string = '{"images":[{"classifiers":[{"classifier_id":"default","name":"default","classes":[{"class":"banana","score":0.562,"type_hierarchy":"/fruit/banana"},{"class":"fruit","score":0.788},{"class":"diet (food)","score":0.528,"type_hierarchy":"/food/diet (food)"},{"class":"food","score":0.528},{"class":"honeydew","score":0.5,"type_hierarchy":"/fruit/melon/honeydew"},{"class":"melon","score":0.501},{"class":"olive color","score":0.973},{"class":"lemon yellow color","score":0.789}]}],"image":"fruitbowl.jpg"}],"images_processed":1,"custom_classes":0}';
$array = json_decode($string,1);
foreach($array['images'] as $key => $images)
{
foreach($images['classifiers'] as $key => $classes)
{
foreach($classes['classes'] as $cls_score){
echo "class = ". $cls_score['class']. " & score = ". $cls_score['score'].PHP_EOL;
}
}
}
WORKING DEMO: https://3v4l.org/vF2RL

Answer 2

Can you try ?
$str = '{ "images": .... }';
// get associative array from json
$result = json_decode($str, true)['images'];
foreach ($result as $imgage => $classifiers) {
foreach ($classifiers["classifiers"] as $classifier) {
foreach ($classifier["classes"] as $clas) {
foreach ($clas as $key => $value) {
// you can add condition here to target only desired keys
echo $key . ": " . $value;
}
}
}
}