(PHP 4 >= 4.0.4)
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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