php form submit only data that was used
I am creating a scoring system for deer and I have a form that asks for the measurements. I also have an option that adds more forms (if the deer has more than 4 tines, or 4 abnormal points). Now when I submit my form it sends it a /add.php. I have it so it displays the original forms and then I want to make it so it shows the addition forms. BUT only if they used that form. So basically I want it to display the measurement in the fields ONLY if they were used.
I have the above code in my /add.php to pull in the information from my forms.
$a = $_GET['a'];
$b = $_GET['b'];
$c = $_GET['c'];
$d = $_GET['d'];
$answer = $a + $b + $c + $d + $e + $f + //....continue...//
The above code is to add more fields (along with a ID set in the table). Basically when you click add more it adds the next field. So for the above example it displays "D" and then when clicked add more it displays "E" which is just another table. This above code is in my forms on a seperate page
<table width="400" id="file_d" style="display:none" cellspacing="0" cellpadding="0" border="0">
<td width="100"><input type="text" name="pp"></td>
<td width="50"> </td>
<td width="100"><input type="text" name="qq"></td>
<a href="#" id="link_d" onclick="new_field('file_e');hide_mais('link_d')">Add More</a>
The above is an example of one of the forms that im using.
<input type="text" name="pp">
I am wanting to display the original fields (a,b,c,d,etc..) and then if someone had clicked "add more" and entered in another field. I want that field to be displayed as well (aa,bb,cc,etc...)
I tried something like
But that just displays the field regardless of whether or not information was put in.
if (!isset($_POST['q']) || empty($_POST['q']))
<td width='50'><?php echo $q; ?></td>
I dont know much about php so any help would be appreciated