Decoding JSON in PHP can't access the first key - php

Question

I have a PHP script which successfully decodes a JSON string into a PHP object using:
$amount_detail = json_decode($tuitionfee->amount_detail);
when I print it out, this is what I get
stdClass Object
(
[1] => stdClass Object
(
[amount] => 0
[date] => 2023-01-08
[amount_discount] => 55200
[amount_fine] => 0
[description] =>
[collected_by] => Super Admin(356)
[payment_mode] => Cash
[received_by] => 1
[inv_no] => 1
)
[2] => stdClass Object
(
[amount] => 36800
[date] => 2023-01-08
[description] => Collected By: Super Admin
[amount_discount] => 0
[amount_fine] => 0
[payment_mode] => Cash
[received_by] => 1
[inv_no] => 2
)
)
In trying to get the first object [amount_discount], I went further to do this:
if (is_object($amount_detail)) {
foreach ($amount_detail as $amount_detail_key => $amount_detail_value) {
$discount = $amount_detail_value->amount_discount;
}
}
But this is collecting data from the second key [amount_discount].
So instead of getting 55200, I'm getting 0.
How do I get to access data from the first key too?

Answer 1

The $discount variable gets over-written each time loop is executed. So you will always get the last data.
So if you want only the first index value then use current()
$discount = current((Array)$amount_detail_value)->amount_discount;
Output: https://3v4l.org/8Wvqv
Note: In case you want all discount output then in your loop echo the $discount variable.