在PHP中使用Map数组更改数组键

Question

In the main array, I have:

 $array=array('index1'=>'value1', 'index2'=>'value2' , ....);

In another array, I keep the key=>index relationship:

$map=array('key1'=>'index1', 'key2'=>'index2' , ...);

Is there any simple way to combile these two array into one to get:

$combine=array('key1'=>'value1', 'key2'=>'value2', ...);

that is values from main array and keys comes from the map array.

Answer 1

Loop through the $map array and extract the value for $array accordingly and put them to the $combine array. You can try this -

$array=array('index1'=>'value1', 'index2'=>'value2');
$map=array('key1'=>'index1', 'key2'=>'index2');

$combine = array();

foreach($map as $key => $val) {
    $combine[$key] = $array[$val];
}
var_dump($combine);

Output

array(2) {
  ["key1"]=>
  string(6) "value1"
  ["key2"]=>
  string(6) "value2"
}