Check in a form if email exists in whmcs clients database

[alexistkd]

Hi i created a payment notification form that includes fields like name, phone, comments and e-mail, theres any way i can validate if the e-mail filled by the client exists in whmcs clients database? and if not then disable the next steps. So field should validate if its a existing e-mail address.

 

thank you.

[sentq]

use Data Feeds to query WHMCS Database to check if email is exist, and connect to that data feed file using AJAX or cURL depends on how your form works

[alexistkd]

but any idea of which data feed do i need to use? i saw also this but im not sure about it: http://www.whmcsjet.com/how-to-check-existing-client-in-whmcs-by-email/

[sentq]

but any idea of which data feed do i need to use? i saw also this but im not sure about it: http://www.whmcsjet.com/how-to-check-existing-client-in-whmcs-by-email/

Use your own data feed

I see that code you share can handle the task!