PHP，如何在redirect_uri中添加php代码？

Question

i have a facebook code:

<iframe src="http://www.facebook.com/plugins/registration.php?
         client_id=138987726427834&
         redirect_uri=https://xxx.com/login.php?login=<?php echo  $login; ?>&pass=<?php echo  $pass; ?>&
         fields=<?php echo urlencode($fields);?>"
</iframe>

i was wondering why the $login and $pass dont work inside the redirect_uri? they don't render inside the link.

i see that the ields=<?php echo urlencode($fields);?>" takes php.

any idea?

thanks

Answer 1

You probably want to escape that parameter with

redirect_uri=<?php echo urlencode("https://xxx.com/login.php?login={$login}&pass={$pass}"); ?>&

If you don't URL encode the URL, then you will send the parameters login and pass to registration.php, not to login.php.

Also, passing sensitive data such as passwords directly as GET variables is a bad practice. You might at least encrypt the password if you have to send it via GET.