php populate listbox dynamically without submitting form - php

Question

I'll try to explain this as best as I can.
I have a form that accepts multiple fields, and in the end, e-mails all the fields to a specific e-mail address.
So for example, I have three text boxes, one list box and two submit buttons.
Two of the text boxes are first name, and e-mail address
The third text box is used to populate the list box. So if I enter, NIKE, into the third text box and push the first submit button. Nike will now be in the listbox.
I want to be able to populate the list box with as many entries as needed, then push the second submit button to send all information (first name, e-mail address and all items in list box).
The problem is, pushing the first submit button always triggers the e-mail sent, since I'm "POST"ing.
I have everything working right now. The third text box submits the new data to a table in mysql, and then retrieves all the data and puts it in the list box.
What's the best way to fix this scenario? Could I stop the Post variable from validating, until the second submit button is used?
Also, I'd like to avoid Javascript, thanks

Answer 1

Make sure the two submit buttons have names. I.E: <input type="submit" name="command" value="Add"> and <input type="submit" name="command" value="Send">. Then you can use PHP to determine which one was clicked:
if($_REQUEST['command'] == 'Add')
{
// Code to add the item to the list box here
}
elseif($_REQUEST['command'] == 'Send')
{
// Code to send the email here...
}
BONUS: For extra credit, make the commands variables so they can be easily changed, and map them to functions...
<?php
$commands = array(
'doSendEmail' => 'Send Email',
'doAddOption' => 'Add Option',
);
function doSendEmail()
{
// your email sending code here...
}
function doAddOption()
{
// your option adding code here...
}
function printForm()
{
global $commands;
?>
Name: <input type="text" name="name"><br>
Email: <input type="text" name="name"><br>
<input type="text" name="add">
<input type="submit" name="command" value="<?= $commands['doAddOption'] ?>">
<select>
<?php /* some code here */ ?>
</select>
<input type="submit" name="command" value="<?= $commands['doSendEmail'] ?>">
<?php
}
if(isset($_REQUEST['command']))
{
$function = array_search($_REQUEST['command'],$commands);
if($function !== -1)
call_user_func($function);
}