array_sum — Returns the sum of an array's elements.
array array: Array
containing values to sum
Sum of the values in an array; NULL on failure
This function simply totals the numeric values of the
elements of array and returns
the result. If array contains
other arrays or objects, they're skipped. Non-numeric
values in array are internally
cast to their numeric equivalents for the addition; this
casting is internal only and these values still have
their original values and types after the call.
PHP 4 since 4.0.4
Example 34. Sum the elements
of an array
$array = array(1, 2, "3.3 kilograms", array(4));
echo "The sum of the elements is: " . array_sum($array) . "\n";
The sum of the elements is: 6.3
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
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