<?php

$data[0] = array(
    'uang' => '100',
    'nama' => 'yudha'
);
$data[1] = array(
    'uang' => '200',
    'nama' => 'yudhaez021'
);
$data[2] = array(
    'uang' => '1000',
    'nama' => 'musa'
);
$localStorage = json_encode($data, true); // data localStorage bentuk array

$loalStorage_decode = json_decode($localStorage, true);
foreach ($loalStorage_decode as $key => $i) {
    $data_send = array(
        'uang' => $i['uang'],
        'nama' => $i['nama']
    );
    $db->insert("invoice_item", $data_send); // kirim data ke table invoice item dengan struktur kolom (id, uang, nama)
}

?>