Problem with a querystring

I've a question on the generation of a query string.

I've a web form on a popup with this code (this is only a piece of code):

"<tr>  
<td><center><b>"; print ($espandi[$i]); echo "</b></center></td>
<td><input type='text' id='$articolo1_val_S_valore[$i]' name='$articolo1_val_S_$espandi[$i]' size='5'></td>  
<td><input type='text' id='$articolo1_val_M_valore[$i]' name='$articolo1_val_M_$espandi[$i]' size='5'></td>  
<td><input type='text' id='$articolo1_val_L_valore[$i]' name='$articolo1_val_L_$espandi[$i]' size='5'></td>  
<td><input type='text' id='$articolo1_val_XL_valore[$i]' name='$articolo1_val_XL_$espandi[$i]' size='5'></td>  
<td><input type='text' id='$articolo1_val_XXL_valore[$i]' name='$articolo1_val_XXL_$espandi[$i]' size='5'></td>      
</tr>"

Where $espandi[$i] will print a code took from the database.

Ok, now i must to create a querystring that contains $espandi[$i] and than the value of $articolo1_val_S_valore[$i] [etc etc]...so a "dynamic" query string "dinamica" because i won't know before how many codes ($espandi[$i]) i will have, while the number of the size (S, M, XL, XXL) is preset.

So, i would a querystring like this:

[B]inserimento_ordini.php?S=$espandi[$i]:$articolo1_val_S_valore[$i] ;$espandi[$i]:$articolo1_val_S_valore[$i].....&M=$espandi[$i]:
$articolo1_val_M_valore[$i];$espandi[$i]:$articolo1_val_M_valore[$i]...[/B]

for example:
inserimento_ordini.php?S=30:400;35:500.....&M=30:450;35:0...

I don't know if this is the best way, so i'll wait for your suggestions.

PS: the web-form will "create" and send the querystring to the opener window.

Edited by Jordan, 09 April 2009 - 06:48 AM.
Use code tags for long strings please