- var_dump: documentation ( source)
- sprintf: documentation ( source)
<?php
$payment_amount = 9475.8;
var_dump($payment_amount);
var_dump($payment_amount * 100);
var_dump(sprintf("%010d", (int) ($payment_amount * 100)));
var_dump(sprintf("%10d", 9475.8 * 100));
var_dump(sprintf("%10d", 947580));