PHP and MySQL Web Development 4th Ed-tqw-_darksiderg

Implementing Administrative Functions
733
The display_button() function creates an image link to a script with GET parameters
where required; the display_preview_button() function gives a plain link into the
archive.This link pops up in a new window, achieved using the target="new" attribute
of the HTML anchor tag.You can see the result of previewing the HTML version of a
newsletter in Figure 30.14.
Figure 30.14
This preview of an HTML newsletter is shown complete
with images.
Sending the Message
Clicking on the Send button for a newsletter activates the send action, which triggers
the following code:
case 'send':
send($_GET['id'], $_SESSION['admin_user']);
break;