php数组之和

Question

I have the following array with multiple levels. I wish to get the sum total of [price], [adults] and [childern] but have not been able traverse the levels.

The answer I should get with this example is price=380 adults=5 and children=1

Array ( 
    [8] => Array ( 
        [2] => Array ( 
            [num_rooms] => 2 
            [adults] => Array ( 
                [0] => 1 
                [1] => 1 
             ) 
             [children] => Array ( 
                 [0] => 0 
                 [1] => 0 
             ) 
             [prices] => Array ( 
                 [0] => 50 
                 [1] => 50 
             ) 
             [price] => 130 
             [supp] => 30 
         ) 
         [3] => Array ( 
             [num_rooms] => 1 
             [adults] => Array ( 
                 [0] => 1 
             ) 
             [prices] => Array ( 
                 [0] => 100 
             ) 
             [price] => 150 
             [supp] => 50 
         ) 
     ) 
     [1] => Array ( 
         [2] => Array ( 
             [num_rooms] => 2 
             [adults] => Array ( 
                 [0] => 1 
                 [1] => 1 
             ) 
             [children] => Array ( 
                 [0] => 1 
                 [1] => 0 
             ) 
             [prices] => Array ( 
                 [0] => 75 
                 [1] => 75 
             ) 
             [price] => 170 
             [supp] => 20 
         )
     )
 )

Thanks

Answer 1

This should work:

$price = 0;
$adults = 0;
$children = 0;

foreach($arr as $l1_key => $l1_value)           // iterates over the first level array
{
    foreach($l1_value as $l2_key => $l2_value)  // iterates over second level arrays
    {
         $price += $l2_value['price'];          // add up price totals

         foreach($l2_value['adults'] as $value) // iterate through adults array values
         {
             $adults += $value;                 // sum up adult count
         }

         foreach($l2_value['children'] as $value) // iterate through children array values
         {
             $children += $value;                // sum up children count
         }
    }
}

// now $price, $adults, and $children contain the totals for each