如何获得数组成员的总和？

This is an PHP array:

array
  'ItemId' => 
    array
      0 => string '32' (length=2)
      1 => string '33' (length=2)
      2 => string '35' (length=2)
  'ItemQty' => 
    array
      0 => string '2' (length=1)
      1 => string '1' (length=1)
      2 => string '1' (length=1)

What I like to achieve is to count the numbers in the strings in ItemQty

So here the outcome would be 4.

I tried to use a foreach loop but the outcome is always 3 not 4 (logical I think, but cant solve it)

The array above is a small version of a var_dump of POST values. Its for form validation.

$count_total = 0;

foreach ($jcart->get_contents() as $item) {     

            ++$count_total;

}

What is also seems to make complicated is that $jcart->get_contents() is not just an normal array. At least I don't now how to apply it to the solutions beneath.

var_dump($jcart); gives an object in which the total is already stored as well

private 'itemCount' => int 4

Use array_sum().

$sum = array_sum($arr['ItemQty']);

This will do it:

$sum = 0;
foreach ($array['ItemQty'] as $val) {
  $sum += $val;
}

If you simply want to sum the numbers you can utilise array_sum(), if it's a single dimensional array. Or, alternatively, you can use a foreach loop and iterate through it whilst adding to a sum var, like so:

$sum = 0;
foreach($item in $items) {
    $sum += $item;
}

Since your question can also mean count all values in an array. You can use PHP's count() function to count the total values in an array.

How about something like:

echo array_sum(array_map('intval', $data['ItemQty']))

This will call intval() for each item in the $data['ItemQty'] array and then call array_sum to give you the sum of the result.