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630ac05213
git-svn-id: https://svn.php.net/repository/phpdoc/zh/trunk@95449 c90b9560-bf6c-de11-be94-00142212c4b1
72 lines
1.7 KiB
XML
Executable File
72 lines
1.7 KiB
XML
Executable File
<?xml version="1.0" encoding="gb2312"?>
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<!-- $Revision: 1.1 $ -->
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<!-- $Author: dallas $ -->
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<!-- EN-Revision: 1.4 Maintainer: dallas Status: ready -->
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<refentry id="function.array-sum">
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<refnamediv>
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<refname>array_sum</refname>
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<refpurpose>
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计算数组中所有值的和
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</refpurpose>
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</refnamediv>
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<refsect1>
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<title>说明</title>
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<methodsynopsis>
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<type>mixed</type><methodname>array_sum</methodname>
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<methodparam><type>array</type><parameter>array</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>array_sum</function> 将数组中的所有值的和以整数或浮点数的结果返回。
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</para>
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<para>
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<example>
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<title><function>array_sum</function> 例子</title>
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<programlisting role="php">
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<![CDATA[
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$a = array(2, 4, 6, 8);
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echo "sum(a) = ".array_sum($a)."\n";
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$b = array("a"=>1.2,"b"=>2.3,"c"=>3.4);
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echo "sum(b) = ".array_sum($b)."\n";
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]]>
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</programlisting>
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<para>
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以上程序输出为：
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<screen role="php">
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<![CDATA[
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sum(a) = 20
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sum(b) = 6.9
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]]>
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</screen>
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</para>
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</example>
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</para>
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<note>
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<para>
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PHP 4.0.6 之前的版本修改了传入的数组本身，将其中的字符串值转换成数值（大多数情况下都转换成了零，根据具体值而定）。
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</para>
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</note>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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