arrange checkbox values in two columns - php

Question

I have a form with check box values i want to arrange the checkbox in two columns instead of
one single long column.
How can i split it to two columns ?
Here is the code :
<form id="form" name="form" method="post" action="">
<table width="502" border="0">
<tr>
<td>
Name :
<input type="textbox" name="rcv_group_name" value="">
<input type="hidden" name="add" value="add" />
</td>
</tr>
<tr>
<td align="left">
<strong>HEADING</strong>
<?php
$q = "select * from Config_RCV";
$r = mysqli_query ($dbc, $q);
if (mysqli_num_rows($r) > 0)
{
$k=0;
while ($row = mysqli_fetch_array($r,MYSQLI_NUM))
{
?>
<br> <input type="checkbox" name ="rcv_val[]" value ="<? echo $row[0];?>" /> <? echo $row[1];?>
<?
$k++;
}
}
?>
</td>
</tr>
<tr>
<td align="right"><input type="submit" name="Submit" id="Submit" value="Submit" style="background-color:#999" />
< /td>
<td height="26" align="left"> </td>
<td> </td>
</tr>
</table>
<form>

Answer 1

add another table and make 2 columns by splitting 2'nd result:
if (mysqli_num_rows($r) > 0) {
$k=0;
echo '<table><tr>';
while ($row = mysqli_fetch_array($r,MYSQLI_NUM)) {
?>
<td><input type="checkbox" name ="rcv_val[]" value ="<?php echo $row[0];?>" /> <?php echo $row[1];?> </td>
<?php
$k++;
if($k%2 == 0){
echo '</tr><tr>';
}
}
echo '</table>';
}

Answer 2

use your $k
if ($k%2==0){
echo "<br />";
}
instead of the lone now
Using tables like above will probably be better for looks

Answer 3

You could just add a second column to your table:
echo "<tr>";
$i = 0;
while ($row = mysqli_fetch_array($r,MYSQLI_NUM)) {
if ($i++%2==0) {
echo "</tr><tr>";
}
echo "<td>".$CELL_CONTENT_HERE."</td>";
}
echo "</tr>";