- var_dump: documentation ( source)
- number_format: documentation ( source)
<?php
$request = [];
$request['transaction'] = array(
'payment_type' => '…',
'amount' => number_format(1171.0, 2)*100,
'currency' => 'EUR',
'system_url' => '…',
'return_url' => '…',
);
var_dump($request);