Unfortunately it is not possible to use external payment system.
I have devised a system to use the form data to redirect to a certain payment page.
Here is how to do it:
First create a new form with fields (I am using WIX and 123forms wysiwyg editor).
and publish it.
Using Google Chrome Developer tools (ctrl-shift-i) or other browser and find out the required field identifier
it looks something like this:
(Thanks to 123forms excellent support)
(An even better explanation)
Then you need to create script that can read this data and host it.
I use FreeHostingEU to host my script and NameCheap for a domain register.
In FreeHostingEU I put the following file, hello.php:
<?php
$adults = $_GET['adults'];
if ($adults==1){
header("Location: https://link1...");
die();
}
if ($adults==2){
header("Location: https://link2...");
die();
}
if ($adults==3){
header("Location: https://link3...");
die();
}
else{
header("Location: https://link4...");
die();
}
?>
<html>
<head></head>
</html>
Return to the form editor and go to Settings -> Thank you page and select Redirect with custom variables
Add a link to the php file with these parameters:
http://yourdomain.com/hello.php?s=form-222222&customVars123=yes&adults=request123456
Where 123456 is the id we extracted earlier.
That is it.
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