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@ 2023-01-24T10:47:35Z

<?php

$array = array
(
    1 => array
        (
            '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 => array
        (
            '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
        )

);

//sample code to just create stdclass array like you, so don't use it
$array = json_decode(json_encode($array));
print_r($array);

echo $discount = current( (Array)$array )->amount_discount;

Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: 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 ) ) 55200

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