JSON and CSV from the same page

A page's PHP already produces its data, so the same page can answer with that data instead of rendering its template. The PHP names what may leave the server in $padExpose - nothing else ever does, and an engine variable never does:

PHP
fragments/data_answers_1.php 		HTML
fragments/data_answers_1.pad 		Result 
<?php

  $orders    = [ [ 'id' => 1, 'customer' => 'Ann', 'amount' => 12.5 ],
                 [ 'id' => 2, 'customer' => 'Bob', 'amount' => 7    ] ];
  $total     = 19.5;
  $padExpose = [ 'orders', 'total' ];

?>
 
<ul>
  {orders}<li>{$customer}: {$amount}</li>{/orders}
</ul>
<p>Total: {$total}</p>
  • Ann: 12.5
  • Bob: 7

Total: 19.5

Asked with &padFormat=json - or by a client sending Accept: application/json - that page answers the named variables as one JSON object. &padFormat=csv, or Accept: text/csv, answers the first list among them as a table with a header row. The template does not run for either:

PHP
fragments/data_answers_2.php 		HTML
fragments/data_answers_2.pad 		Result 
<?php

  $json = padCurl ( $padGoExt . 'fragments/data_answers_1&padFormat=json' ) ['data'];
  $csv  = padCurl ( $padGoExt . 'fragments/data_answers_1&padFormat=csv'  ) ['data'];

?>
 
{$json}
{$csv}
 
{
    "orders": [
        {
            "id": 1,
            "customer": "Ann",
            "amount": 12.5
        },
        {
            "id": 2,
            "customer": "Bob",
            "amount": 7
        }
    ],
    "total": 19.5
}
id,customer,amount
1,Ann,12.5
2,Bob,7