Basically I just would like to know if there is a built-in way of doing this, that might be faster, like maybe with an array_map callback or something:
function array_rekey($a, $column)
{
$array = array();
foreach($a as $keys) $array[$keys[$column]] = $keys;
return $array;
}
This should work for you:
Just pass NULL as second argument to array_column() to get the full array back as values and use $column as third argument for the keys.
$result = array_column($arr, NULL, $column);
example input/output:
$arr = [
["a" => 1, "b" => 2, "c" => 3],
["a" => 4, "b" => 5, "c" => 6],
["a" => 7, "b" => 8, "c" => 9],
];
$column = "b";
$result = array_column($arr, NULL, $column);
print_r($result);
output:
Array
(
[2] => Array
(
[a] => 1
[b] => 2
[c] => 3
)
[5] => Array
(
[a] => 4
[b] => 5
[c] => 6
)
[8] => Array
(
[a] => 7
[b] => 8
[c] => 9
)
)
array_combine() and array_map(), like this: $result = array_combine( array_map(function($v)use($column){ return $v[$column] }, $a), $a); OR you can use array_column() for under php 5.5.