- json_encode: documentation ( source)
- http_build_query: documentation ( source)
<?php
$x = [
'contractors_payments_1c_id' => 'er6545454'
,'suppliers_id' => 30
,'contractors_payments_total' => 78000
,'contractors_payments_date' => '2015-07-26 12:00:00'
,'contractors_payments_customers_id' => null
];
echo http_build_query(['data' => json_encode($x),'key' => '1c_secret_key']);