<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.13 $ -->
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<refentry xml:id="function.array-sum" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>array_sum</refname>
  <refpurpose>Calculate the sum of values in an array</refpurpose>
 </refnamediv>
 <refsect1>
  <title>Description</title>
  <methodsynopsis>
   <type>number</type><methodname>array_sum</methodname>
   <methodparam><type>array</type><parameter>array</parameter></methodparam>
  </methodsynopsis>
  <para>
   <function>array_sum</function> returns the sum of values
   in an array as an integer or float.
  </para>
  <para>
   <example>
    <title><function>array_sum</function> examples</title>
    <programlisting role="php">
<![CDATA[
<?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";
?>
]]>
    </programlisting>
    &example.outputs;
    <screen>
<![CDATA[
sum(a) = 20
sum(b) = 6.9
]]>
    </screen>
   </example>
  </para>
  <note>
   <para>
    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).
   </para>
  </note>
 </refsect1>
</refentry>

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