关联数组计算

Question

我有这样的结果数组（下图）。

 
Array 
(
    [10] => Array 
     (
      [0] => Array 
       (
        [iPlannedCourseId] => 56 
        [fCreditHours] => 15.25 
       ) 

      [1] => Array 
       (
        [iPlannedCourseId] => 57 
        [fCreditHours] => 14.50 
       ) 

     ) 

    [11] => Array 
     (
      [0] => Array 
       (
        [iPlannedCourseId] => 58 
        [fCreditHours] => 12.25 
       ) 

      [1] => Array 
       (
        [iPlannedCourseId] => 59 
        [fCreditHours] => 14.75 
       ) 

      [2] => Array 
       (
        [iPlannedCourseId] => 60 
        [fCreditHours] => 15.25 
       ) 

     ) 

) 

我想按照父母键来加总fCreditHours。有没有使用循环 即的任何功能，

 
Array 
(
     [10] = > 29.75 
     [11] = > 42.25 
) 

Answer 1

你可以用array_walk（）http://php.net/manual/en/function.array-walk.php

Answer 2

您可以array_walk_recursive尝试array_map组合尝试。

我认为这是对你有用：

$a = array(100,300, 
        array(
         2, 
         4, 
         ), 
         array(
         13, 
         80, 
         ), 
         array(
         40, 
       50, 
         ),2.2,420,       
       ); 


$max = 0; 

array_walk_recursive($a, 'arrmax'); 
function arrmax($item, $key) { 
    global $max; 
    $max = ($item > $max) ? $item : $max; 

} 
echo "Maximum Value is : " . $max;