php loop through json array - php

Question

I have a json string like this:
$fields_string = '
{"fields":
{"customers":[{"name":"john","id":"d1"},
{"name":"mike","id":"d2"},
{"name":"andrew","id":"d3"},
{"name":"peter","id":"d4"}]
}
}'
How can I print each name? I will use them later in a html select options, I know how to do that. But I couldn't get the string out.
Here are something I tried:
$obj = json_decode($fields_string);
$fields_detail = $obj-?{"fields"}->{"customers"};
at this point, I am able to print the customer array out by echo json_encode($fields_detail), but before that, I want to get the name break down using foreach. I tried several times, it didn't work. Can anyone help please.
Thanks!

Answer 1

Customers is an array of objects so iterating over each object and reading the property should work.
foreach ($fields_detail as $customer) {
echo $customer->name;
}

Answer 2

Something like this:
$data = json_decode($fields_string, true); // return array not object
foreach($data['fields']['customers'] as $key => $customer) {
echo $customer['name'];
}

Answer 3

Access the names via fields->customers:
$obj = json_decode($fields_string);
foreach($obj->fields->customers as $customer)
{
echo $customer->name . "\n";
}
Demo

Answer 4

foreach($obj->fields->customers as $fields)
echo $fields->name;