<?php
if(isset($_POST['additem_button']))
$sub_category_p = isset($_POST['sub_category']);
if($main_category_p == "Choose..."){ $main_category_p = ""; }
echo "$main_category_p";
?>
<select name = 'main_category'>
<option value="Choose one">Choose...</option>
<option value="Apparel">Apparel</option>
<option value="Home Decor">Home Deco</option>
<option value="Beauty">Beauty</option>
</select>
it doesnt echo out any thing. no matter which option i chlice in select.