Question

我有一个数组$minus

array(3) { [0]=> string(6) "people" 
           [1]=> string(7) "friends" 
           [2]=> string(8) "siblings" 
         }

我有一个数组$user

array(3) { ["people"]=> string(3) "100" 
           ["friends"]=> string(2) "10" 
           ["siblings"]=> string(2) "57" 
         }

我可以使用$user的值来获取$minus的值，

echo $user[$minus[0]] . ', ' . $user[$minus[1]] . ', ' . $user[$minus[2]];
// Would echo: 100, 10, 57

但是如何通过将$user的值用于新数组来获取$minus的值，新数组应该是，

array(3) { [0]=> string(3) "100" 
           [1]=> string(2) "10" 
           [2]=> string(2) "57" 
         }

我尝试使用foreach循环，但永远不能正确使用它？

Answer 1

foreach($minus as $key=>$value) {
  $new_array[$key] = $user[$value];
}

Answer 2

仅使用array_map，PHP＆gt; = 5.3

$new_array = array_map(function($item) use ($user) {return $user[$item];}, $minus);

Answer 3

$new_array= array();
foreach ($minus as $key => $value){
 $new_array[$key] =  $user[$value];
    }
print_r($new_array);

Answer 4

$new_array = array($user[$minus[0]], $user[$minus[1]], $user[$minus[2]]);

Answer 5

$minus = array(0 => "people",
               1 => "friends",
               2 => "siblings"
              );

$user = array("people"   => "100",
              "friends"  => "10",
              "siblings" => "57"
             );


$newArray = $minus;
array_walk($newArray,function(&$item, $key, $prefix) { $item = $prefix[$item]; },$user);

var_dump($newArray);

用于检查PHP中的其他数组值的数组值？

5 个答案: