Question

What would be the proper way to write:

<input type="hidden" name="recipient" value="<?php $user_id; ?>"/>

I can’t seem to get the form to submit the value.

Answer 1

You probably want to echo that value:

<?php echo $user_id ?>

Additionally, when filling in HTML attributes, you should always escape the values:

<?php echo htmlspecialchars($user_id) ?>

So, the proper way to output the variable would be:

<input type="hidden" name="recipient" value="<?php echo htmlspecialchars($user_id) ?>"/>