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array_sum
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array_sum

Name

array_sum — Returns the sum of an array's elements.

Synopsis

mixed array_sum(array); array array: Array containing values to sum

Returns

Sum of the values in an array; NULL on failure

Description

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.

Version

PHP 4 since 4.0.4

Example

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";

Output:
The sum of the elements is: 6.3

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PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.