Convert a 2d array into a flat associative array using two columns

Question

I have array

$Old = [_1526906780329_329] => Array (
    [frlabel] => aa
    [enlabel] => AA
    )
[_1526906783640_640] => Array (
    [frlabel] => bb
    [enlabel] => BB
    )

I want $old array to convert it in single array key value format like

array('AA' => 'aa','BB' => 'bb');

Answer 1

$Old = [
    '_1526906780329_329' => [
        'frlabel' => 'aa',
        'enlabel' => 'AA',
    ],
    '_1526906783640_640' => [
        'frlabel' => 'bb',
        'enlabel' => 'BB',
    ],
];

$newArray = array_column($Old, 'frlabel', 'enlabel');
print_r($newArray);

Output:

Array
(
    [AA] => aa
    [BB] => bb
)