Assigning and Summing Array Values in a Loop

Consider an array with key-value pairs, such as:

$group = [
    'doc1' => 8,
    'doc2' => 7,
    'doc3' => 1
];

To obtain the sum of the values, an initialization step is necessary:

$sum = 0;

With this initialized variable, a loop can accumulate the values as follows:

foreach ($group as $key => $value) {
  $sum  = $value;
}

Finally, the total sum can be printed:

echo $sum; // Output: 16

This solution efficiently calculates the sum of array values by iteratively adding them to a running total.