重新排列并获得PHP数组的等效值

Question

Is there a way on PHP where I can get the arrangement of the strings inside $input array:

$input = array(3) {
    [0]=>
    string(3) "one"
    [1]=>
    string(3) "two"
    [2]=>
    string(5) "three"
}

Then use the $reference array as reference for the equivalent

$reference = array(3) {
    [0]=>
    array(2) {
        [0]=>
        string(1) "2"
        [1]=>
        string(3) "two"
    }
    [1]=>
    array(2) {
        [0]=>
        string(1) "3"
        [1]=>
        string(5) "three"
    }
    [2]=>
        array(2) {
        [0]=>
        string(1) "1"
        [1]=>
        string(3) "one"
    }
}

And result to the $output array?

$output = array(3) {
    [0]=>
    string(3) "1"
    [1]=>
    string(3) "2"
    [2]=>
    string(5) "3"
}

Answer 1

You can reindex your reference array by the second column ("two", "three", etc.) using array_column.

$words = array_column($reference, 0, 1);

Then get your output by looking up the key corresponding to each value from $input in the reindexed array.

$output = array_map(function($x) use ($words) {
    return $words[$x];
}, $input);