   #PHP Manual Array Functions array_splice array_udiff_assoc

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                                   array_sum

   (PHP 4 >= 4.0.4)
   array_sum --  Calculate the sum of values in an array.

Description

   mixed array_sum ( array array)

   array_sum() returns the sum of values in an array as an integer or
   float.

   Example 1. array_sum() examples
   <?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";
   ?>

   The printout of the program above will be:
sum(a) = 20
sum(b) = 6.9

     Note: PHP versions prior to 4.2.1 modified the passed array itself
     and converted strings to numbers (which most of the time converted
     them to zero, depending on their value).
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