build an array multidimensional from query results - php

Question

I have this code that outputs something like:
Array (
[0] => 15
[1] => 13
[2] => 16
[3] => 16
[4] => 10
[5] => 10
[6] => 13
[7] => 13
)
But, i want this structure:
Array (
[0] => Array ( [0] => 15, [1] => 13, [2] => 16, [3] => 16)
[0] => Array ( [0] => 10, [1] => 10, [2] => 13, [3] => 13)
)
This didn't solve : $score[] = array($score_bd);. Any idea ?
php code
$i =0;
foreach ($arr_user_apply as $val) {
$new_val = array($val);
$arr[$i] = array_merge($str, $new_arr_tags_ids, $new_val, $new_id_oferta);
$sql = $db -> prepare("
query
"
);
call_user_func_array(array($sql, "bind_param"), $arr[$i]);
$sql -> execute();
$sql -> bind_result($score_bd);
while ($sql -> fetch()) {
$score[] = $score_bd;
};
$i++;
}

Answer 1

If you're just trying to add another dimension to your first array by placing the key value of the key into the new array something like this might work:
$firstArray = Array ( 0 => 15, 1 => 15, 2 => 13, 3 => 13, 4 => 16, 5 => 16, 6 => 10, 7 => 10, 8 => 13, 9 => 13, 10 => 6, 11 => 6 );
$newArray = Array();
foreach($firstArray as $key => $value)
{
$newArray[] = Array($key => Array($value));
}
echo "<pre>";
print_r($newArray);
echo "</pre>";
EDIT:
if that's one dimension too deep, then just try this:
$firstArray = Array ( 0 => 15, 1 => 15, 2 => 13, 3 => 13, 4 => 16, 5 => 16, 6 => 10, 7 => 10, 8 => 13, 9 => 13, 10 => 6, 11 => 6 );
$newArray = Array();
foreach($firstArray as $key => $value)
{
$newArray[$key] = Array($value);
}
echo "<pre>";
print_r($newArray);
echo "</pre>";

Answer 2

$arr = array ( 0 => 15 ,1 => 15, 2 => 13, 3 => 13 ,4 => 16 ,5 => 16 ,6 => 10, 7 => 10);
foreach($arr as $key=>$value){
$new_arr[$key][0] = $value;
}

Answer 3

i am not sure if the question is clear, but this works properly to me
$score = array();
while ($sql -> fetch()) {
$score[] = $score_bd;
};
$new_score[] = array($score);
Array (
[0] => Array ( [0] => Array ( [0] => 15 [1] => 13 [2] => 16 ) )
[1] => Array ( [0] => Array ( [0] => 10 [1] => 13 [2] => 6 ) )
)