How to make a sum of array values - php

Question

I have an array and I iterate through its first 7 values with this function:
function clicksLast7Days($data)
{
$path = $data->data->data->clicks;
$num_loops = 0;
foreach ($path as $key => $item){
$num_loops++;
if($num_loops > 7) break;
if ($key >= 0) {
$array[] = $item->clicks;
}
}
return json_encode($array);
}
The array's structure (if it helps) is:
["data"]=>
object(stdClass)#212 (3) {
["status_code"]=>
int(200)
["data"]=>
object(stdClass)#211 (3) {
["days"]=>
int(30)
["total_clicks"]=>
int(6)
["clicks"]=>
array(30) {
[0]=>
object(stdClass)#215 (2) {
["clicks"]=>
int(0)
["day_start"]=>
int(1466395200)
}
[1]=>
object(stdClass)#216 (2) {
["clicks"]=>
int(0)
["day_start"]=>
int(1466308800)
}
[2]=>
object(stdClass)#217 (2) {
["clicks"]=>
int(0)
["day_start"]=>
int(1466222400)
}
[3]=>
object(stdClass)#218 (2) {
["clicks"]=>
int(0)
["day_start"]=>
int(1466136000)
}
[4]=>
object(stdClass)#219 (2) {
["clicks"]=>
int(0)
["day_start"]=>
int(1466049600)
}
[5]=>
object(stdClass)#220 (2) {
["clicks"]=>
int(0)
["day_start"]=>
int(1465963200)
}
[6]=>
object(stdClass)#221 (2) {
["clicks"]=>
int(0)
["day_start"]=>
int(1465876800)
}
[7]=>
object(stdClass)#222 (2) {
["clicks"]=>
int(0)
["day_start"]=>
int(1465790400)
}
The problem is that by using my function I get an array of elements:
[0,0,0,0,0,0,0]. But what I want is to obtain their sum (which in this case is 0), and not an array, just a number.

Answer 1

$clicksArray = $data->data->data->clicks;
$sum = array_sum(
array_map(
$clicksArray,
function($clickElement) {
return $clickElement->clicks;
}
)
);
What does this mean ?
array_sum will sum all values of a certain array. More information here
array_map will return all elements of an array, after applying a function (so, basically here, we are returning only clicks attribute