I need help generating a custom URL based on the user ID - wordpress

Question

I need help on how generate a unique URL based on a users ID for example
var htmlstring = "https://www.google.com" + "?" + <?php get_userdata( $userid ); ?>
This is the JS I have that creates a hyperlink in the html:
Click <script type="text/javascript">
function zs_open_window(url, height, width){var leftPos = 0;var topPos = 0;if(screen){leftPos = (screen.width - width) / 2;topPos = (screen.height - height) / 2;window.open(url, null, 'width='+width+',height='+height+',left='+leftPos+',top='+topPos+', toolbar=0, location=0, status=1, scrollbars=1, resizable=1');}}</script>HERE
I need to get the Wordpress username as a JS variable so I can modify the href to be href="https://survey.zohopublic.com/zs/NbB3YM?USERNAME".
I know how to modify the href, I just don't know how push a username into a JS variable?
Ben

Answer 1

You could setup a global variable on all pages that holds that information by adding this to your header.php file just above the <?php wp_head(); ?> line.
<?php
// Gets the current user.
$current_user = wp_get_current_user();
// Checks if the visitor is logged in.
if ( $current_user->ID !== 0 ) {
// Output JS
?>
<script type="text/javascript">
var htmlstring = "https://survey.zohopublic.com/zs/NbB3YM?username=<?php echo $current_user->user_login ?>";
</script>
<?php
} // End if
?>
You can then use htmlstring in any of your other JS functions or code. I also added the username= parameter as you might need that so you can pass it to something else. If you don't, just remove it.