Question

I have a form that looks like this.

<form action="index.php" method="post">
<select name="dropdownOption">
  <option value="First Choice +200">First Choice</option>
  <option value="Second Choice +300">Second Choice</option>
</select>
<p><input type="checkbox" value="Rocket +100"> Rocket</p>

What I want to do is loop through every value sent in the _POST and then sum up every number after the ‘+’ sign into a variable in the index.php file.

So for example if they chose the ‘Second Choice’ and ticked the ‘Rocket’ Checkbox it should add up to 400 (300+100).

In this example there is only two different options but in the final application there will be 20-30 different things that can vary which is why looping is necessary.

Also How can I loop through every element that is not hidden (so exclude hidden form elements).

Answer 1

foreach ($_POST as $post) {
    $num = explode('+', $post);
    if (is_numeric((int) end($num)) {
        $sum += end($num);
    }
}

If you need negative values you can just make your option look like this:

<option value="Second Choice +-300">Second Choice</option>