Dealing with "random" POST data - php

Question

I have a page that pulls 5 random rows from a table. It looks similar to the below.
<table>
<tr>
<td><input type = 'radio' name='bills[1]' value = 'y'><label for='1'>Yes</label> </td>
<td><input type = 'radio' name='bills[1]' value = 'n'><label for='1'>No</label> </td>
</tr>
<tr>
<td><input type = 'radio' name='bills[8]' value = 'y'><label for='8'>Yes</label> </td>
<td><input type = 'radio' name='bills[8]' value = 'n'><label for='8'>No</label> </td>
</tr>
<tr>
<td><input type = 'radio' name='bills[2]' value = 'y'><label for='2'>Yes</label> </td>
<td><input type = 'radio' name='bills[2]' value = 'n'><label for='2'>No</label> </td>
</tr>
<tr>
<td><input type = 'radio' name='bills[6]' value = 'y'><label for='6'>Yes</label> </td>
<td><input type = 'radio' name='bills[6]' value = 'n'><label for='6'>No</label> </td>
</tr>
<tr>
<td><input type = 'radio' name='bills[3]' value = 'y'><label for='3'>Yes</label> </td>
<td><input type = 'radio' name='bills[3]' value = 'n'><label for='3'>No</label> </td>
</tr>
</table>
This returns an array that looks like the following,
Array
(
[bills] => Array
(
[6] => y
[2] => n
[5] => n
[1] => y
[8] => y
)
)
By using a foreach($_POST['bills'] as $bill) statement I can loop through that array, but how do I get the value of the id, and its respective answer? In the above case, 6, 2, 5, 1, 8.

Answer 1

Include the key on your foreach construct like this
foreach($_POST['bills'] as $bill=>$answer)
{
echo "The value of $bill is $answer\n"; $bill will be 6,2,5,1,8 and $answer will be y,n,n,y,y
}
OUTPUT :
The value of 6 is y
The value of 2 is n
....

Answer 2

You can use key():
<?php
$array = array(
"one" => 1,
"two" => 2,
"three" => 3,
"four" => 4
);
while($element = current($array)) {
echo key($array)."\n";
next($array);
}
?>
OR
foreach($_POST['bills'] as $bill=>$answer)
{
echo "$bill and $answer\n";
}