(PHP 4 >= 4.0.4, PHP 5, PHP 7)
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Example #1 array_sum() ����
<?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";
?>
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sum(a) = 20 sum(b) = 6.9