QUOTE(Freshman @ Aug 13 2019, 01:02 PM)
Try like this - it's a valid but unused number
CODE
https://web.whatsapp.com/send?phone=27833785512&text=123&source=&data=
It should open the WhatsApp web potral with a pre-populated message text '123' to the number I inserted in the URL
Nope. Same redirection happens.
QUOTE
There is a right-arrow 'Send' button which must then be clicked to send the pre-populated message to the inserted number.
All I want to do is automate the send procedure
Making sense now?
So you want use the query string to automatically submit a form? You need to use the URL the form is submitted to, rather than the URL to the page the form is in (that could be the same URL, but typically isn't). With a normal form, that is. Whatsapp may have complicated things. And the form must use the GET method, not POST. Or rather, the script that it's submitted to must be able to handle a GET request.