Syntax of array_sum
number array_sum(array array)
Returns the sum of every element in the array. If all of the values are integers, an integer is returned. If any of the values are floats, a float is returned
Example
<?php
$a = array(2, 4, 6, 8);
echo "sum(a) = " . array_sum($a) . "\n";
$b = array("a" => 1.2, "b" => 2.3, "c" => 3.4);
echo "sum(b) = " . array_sum($b) . "\n";
?>
sum(a) = 20 sum(b) = 6.9