php - 在 array_walk 函数中获取当前索引

Question

$A = ["0" => "a", "1" => "b", "2" => "c"];
$B = ["0" => "aa", "1" => "bb", "2" => "cc"]
array_walk($A,function($item) use($B){
     $temp[] = $item;
     $temp[] = $B[?];
});

怎么填？以上？如何获取array_walk中的当前索引？

Answer 1

如果我理解正确的话，这样的事情会奏效

$A = ["0" => "a", "1" => "b", "2" => "c"];
$B = ["0" => "aa", "1" => "bb", "2" => "cc"]
array_walk($A,function($item, $key) use($B){
     $temp[] = $item;
     $temp[] = $B[$key];
});