payment gateway redirection

hello, we have a correction for the stripe payment gateway in our website
we want to redirect our website to a second website
and from there payment request will send to the stripe gateway.
The security of the implementation of this task is very important to us
please download this script and check it carefully
https://drive.google.com/file/d/1sLE6W_9Ljb_7f6knHeHqyyiZDAl2ANXx/view?usp=sharing
stripe gateway in under this address
vendor/stripe/stripe-PHP
for more clearly :
the main website will get the payment
and redirect payment to the second website
the second website will send payment requests to the stripe online payment gateway
you can read the stripe document here If you don't know this payment method(stripe.com)
if you have any questions please text me
Please be sure to send your request after checking the stripe and our script