Reading sorted array - php

Question

Why $val is Array(1), but not the numeric value? I expected that $selected as $k => $val should return each line from the array $selected. Thus, $k must be a numeric key (it is) and $val must be corresponding numeric value (but it's an array instead of simple integer).
So, how do I correctly save sorted keys and values in array $ind and $ranks?
<?php
$selected = array();
for ($i=0; $i<5; $i++) {
$selected[] = array($i => rand(0,5));
}
arsort($selected);
$ind = array();
$rank = array();
foreach($selected as $k => $val) {
$ind[] = $k;
$rank[] = $val;
}
?>
UPDATE:
For incstance, this code..
for ($i=0; $i<5; $i++) {
$selected[$i] = rand(0,5);
}
provided the array:
[0] => 5, [1] => 3, [2] => 2, [3] => 5, [4] => 3
Once I sorted it, initial keys are deleted, right? How can I find initial keys [0]-[4] of randomly generated values after sorting the array?

Answer 1

I think your likely solution is to change
$selected[] = array($i => rand(0,5));
to
$selected[] = rand(0,5);
Doing so will yield $ind and $rank like this:
Array
(
[0] => 0
[1] => 3
[2] => 2
[3] => 4
[4] => 1
)
Array
(
[0] => 4
[1] => 3
[2] => 1
[3] => 0
[4] => 0
)
The best way to do what you want, is to just use the resultant array, for example:
$selected
Array
(
[1] => 5
[2] => 5
[4] => 4
[0] => 2
[3] => 1
)

Answer 2

I think this is what you need
for ($i=0; $i<5; $i++) {
$selected[$i] = rand(0,5);
}

Answer 3

Your array structure will look like this:
array(
0 => array(0 => 1),
1 => array(1 => 4),
...
)
because you're assigning an array here:
$selected[] = array($i => rand(0,5));
You just want this instead:
$selected[] = rand(0,5);

Answer 4

Hi I am not pretty much sure what you are trying to do but following code is creating an array of arrays.
$selected = array();
for ($i=0; $i<5; $i++) {
$selected[] = array($i => rand(0,5));
}
So $val will be an array. You can try following code:
$selected = array();
for ($i=0; $i<5; $i++) {
$selected[] = rand(0,5);
}
Thanks