How to block a deposit on a client's card before the client arrives at the office?

Question

PHP

Good afternoon.
Tell me how you can implement a deposit blocking on the client’s card on the site, i.e. the client enters the site, orders a product/service, enters the card details, presses the confirmation button, after which the deposit in the amount of the cost of the selected goods/services is blocked on the client's card.
and how to unblock / write off funds from the card?
Site language: php
Site engine - self-written.

Answer 1

This is called holding.
You need a payment aggregator that supports it.
Offhand , dengionline.com/dev/protocol/hold and https://www.ruru.ru/
did not work with money online, we are working with ruru now.