php - 如何在PHP中合并具有相同键和不同值的数组？

Question

我有与这些类似的数组:

0 => Array ( [0] => Finance / Shopping / Food, [1] => 47 )            
1 => Array ( [0] => Finance / Shopping / Food, [1] => 25 )                 
2 => Array ( [0] => Finance / Shopping / Electronic, [1] => 190 ) 

我需要创建一个数组，其中 [0] 作为键，[1] 作为值。
棘手的部分是，如果 [0] 相同，则会将 [1] 添加到现有值。

所以我想要的结果是:

array ([Finance / Shopping / Food]=> 72, [Finance / Shopping / Electronic] => 190);

谢谢

Answer 1

// array array_merge_values($base[, $merge[, ...]])
// Combines multiple array values based on key
//   (adding them together instead of the native array_merge using append)
//
// $base       - array to start off with
// $merge[...] - additional array(s) to include (and add their values) on to the base
function array_merge_values()
{
  $args = func_get_args();

  $result = $args[0];
  for ($_ = 1; $_ < count($args); $_++)
    foreach ($args[$_] as $key => $value)
    {
      if (array_key_exists($key,$result))
        $result[$key] += $value;
      else
        $result[$key] = $value;
    }
  return $result;
}

$array1 = Array('foo' => 5, 'bar' => 10, 'foobar' => 15);
$array2 = Array('foo' => 20,                             'foohbah' => 25);
$array3 = Array(            'bar' => 30);
var_dump(array_merge_values($array1,$array2,$array3));

结果:

array(4) {
  ["foo"]=>
  int(25)
  ["bar"]=>
  int(40)
  ["foobar"]=>
  int(15)
  ["foohbah"]=>
  int(25)
} 

那是你要找的？