PHP：将关联数组键和值传递到一行中的新数组（连续），而不使用foreach

Question

Is there a simpler way than using a foreach loop to do a transformation like this?

$assoc = ['keyA' => 'valA', 'keyB' => 'valB', 'keyC' => 'valC'];

$new = ['keyA', 'valA', 'keyB', 'valB', 'keyC', 'valC'];

Answer 1

With array_walk :

$assoc = ['keyA' => 'valA', 'keyB' => 'valB', 'keyC' => 'valC'];

$new = [];

$callback = function($v, $k) use (&$new) {
    $new[] = $k;
    $new[] = $v;
};
array_walk($assoc, $callback);

print_r($new);

Output :

Array ( [0] => keyA [1] => valA [2] => keyB [3] => valB [4] => keyC [5] => valC )

Ref: http://php.net/manual/en/function.array-walk.php