While loop within while loop

[Anon]

Can you while loop within while loop??

like:

while (conditon)

{

while(condition)
{
}

}

I am having problem displaying values with second while loop??

please help... thanx in advanx.

[[deleted]]

Ofcourse you can do a while within a while.
Just be carefull that the inner loop does not affect the condition of the outer loop.

things like this are a killer:

while ($t<$f)
{
while ($t<$g)
{
$f = $t + 2;
};
$t++;
};

[Anon]

i tried it .. but it doesn't work 🙁

here is my code:

if($contents[product][0] != "")
{
$x = 0;
while($x != $cart->num_items($table,$session))
{
echo "<TR><TD>".$contents[name][$x]. "</TD><TD>".$contents[price][$x]. "</TD>\n";
$product = $contents[product][$x];
echo "<TD><INPUT TYPE=text size=3 name=quantity[$product] ";
echo "value=\"".$contents[quantity][$x]. "\"></TD>";
echo "<TD>\$".$contents[total][$x]. "</TD>\n";
echo "<TD><A HREF=\"view_cart.php?remove=".urlencode($contents[product][$x]);
echo "".(!$ShoppingCart? "&session=$session": ""). "\">Remove</A>";

		// echo "$product";

		 $result1 = mysql_query("SELECT * FROM op WHERE product_id=$product AND session='$session'");
		 $op_row = mysql_fetch_array($result1);

		 $op = $op_row[product_id];
		 echo $op;

		 $result2 = mysql_query("SELECT * FROM options WHERE product_id=$op");
		 //$option_row = mysql_fetch_array($result2);	

		 while( $option_row = mysql_fetch_row($result2))	
		 {
		 print "<TR><TD colspan=\"2\">$option_row[name]</TD>
   <TD colspan=\"2\">$option_row[price]</TD>
   <TD>remove<TR>";
   }
		 $x ++;
}

vincent wrote:

Ofcourse you can do a while within a while.
Just be carefull that the inner loop does not affect the condition of the outer loop.

things like this are a killer:

while ($t<$f)
{
while ($t<$g)
{
$f = $t + 2;
};
$t++;
};

[[deleted]]

... and the error is?

[Anon]

the second while loop doesnot display anything

while( $option_row = mysql_fetch_row($result2))
{
print "<TR><TD colspan=\"2\">$option_row[name]</TD>
<TD colspan=\"2\">$option_row[price]</TD>
<TD>remove<TR>";
}

[[deleted]]

That could be because at the end of the print statement you start a cell and a new table-row instead of ending the cell and ending the row.