PHP - 将多维数组中父级的索引更改为子数组值，其中key = string

Question

I've got an multi-dimensional array at the moment and want to remove the second-level of arrays and have the value of that second level as the new index value on the parent array. My current array is:

Array ( [0] => Array ( [connectee] => 1 ) [1] => Array ( [connectee] => 6 ) )

And want from that:

Array ( [0] => 1,  [1] =>  6 )

I was poking around the usort function but couldn't get it to work (where $current_connections is my array as above:

function cmp($a, $b) {
    return strcmp($a["connectee"], $b["connectee"]);
} 

$current_connections = usort($current_connections, "cmp");

The key doesn't need to be maintained (should be destroyed in the process).

Answer 1

foreach ($array as &$value) {
    $value = $value['connectee'];
}