$insert_data = [];
foreach ($json['value'] as $value) {
$posting_date = Carbon::parse($value['Posting_Date']);
$posting_date = $posting_date->format('Y-m-d');
$data = [
'item_no' => $value['Item_No'],
'entry_no' => $value['Entry_No'],
'document_no' => $value['Document_No'],
'posting_date' => $posting_date,
....
];
$insert_data[] = $data;
}
$insert_data = collect($insert_data); // Make a collection to use the chunk method
// it will chunk the dataset in smaller collections containing 500 values each.
// Play with the value to get best result
$chunks = $insert_data->chunk(500);
foreach ($chunks as $chunk)
{
DB::table('items_details')->insert($chunk->toArray());
}