Simple PHP Budget
<p>I'm trying to make a simple budget form. What I need is that if some item is checked the system adds the price of these item (and if unchecked that item again substract it's price of the total).</p>

<pre><code>&lt;form name="myform" method ='post'&gt;
&lt;input name="item" type="checkbox" value="flowers"/&gt;
&lt;input name="item" type="checkbox" value="animals"/&gt;
&lt;/form&gt;
</code></pre>

<p>And what I want is something like</p>

<pre><code>if (item[1].checked) $total_price = $total_price + item[1];
</code></pre>

<p>And likewise</p>

<pre><code>if (item[1].unchecked) $total_price = $total_price - item[1];
</code></pre>
