PHP集团及新增数组

Question

元素我有此数组：

Array(
[0] => Array(
[type] => 
[base] => 10.0 
[amount] => 0 
) 
[1] => Array(
[type] => 15.0 
[base] => 12.0 
[amount] => 1.8 
) 
[2] => Array(
[type] => 15.0 
[base] => 12.0 
[amount] => 1.8 
) 
[3] => Array(
[type] => 2.0 
[base] => 12.0 
[amount] => 0.24 
) 

我怎样才能获得以下数组用PHP？我需要一群“类型”，并称“量” &“量”，但省略不类型值的元素

Array(
[0] => Array(
[type] => 15.0 
[base] => 24.0 
[amount] => 3.6 
) 
[1] => Array(
[type] => 2.0 
[base] => 12.0 
[amount] => 0.24 
) 
) 

Answer 1

array_reduce就派上用场了：

$result = array_reduce($array, function($memo, $item) { 
    if (!isset($item['type'])) return $memo; 
    if (!isset($memo['' . $item['type']])) { // first occurence 
     $memo['' . $item['type']] = $item; 
    } else {         // will sum 
     $memo['' . $item['type']]['base'] += $item['base']; 
     $memo['' . $item['type']]['amount'] += $item['amount']; 
    } 
    return $memo; 
}, array()); 

var_dump(array_values($result));