<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >array_sum</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="Array 数组函数" HREF="ref.array.html"><LINK REL="PREVIOUS" TITLE="array_splice" HREF="function.array-splice.html"><LINK REL="NEXT" TITLE="array_udiff_assoc" HREF="function.array-udiff-assoc.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.array-splice.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.array-udiff-assoc.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.array-sum" ></A >array_sum</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN12075" ></A ><P > (PHP 4 >= 4.0.4, PHP 5)</P >array_sum -- 计算数组中所有值的和 </DIV ><DIV CLASS="refsect1" ><A NAME="AEN12078" ></A ><H2 >说明</H2 >number <B CLASS="methodname" >array_sum</B > ( array array )<BR ></BR ><P > <B CLASS="function" >array_sum()</B > 将数组中的所有值的和以整数或浮点数的结果返回。 </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN12089" ></A ><P ><B >例 1. <B CLASS="function" >array_sum()</B > 例子</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$a </font><font color="#007700">= array(</font><font color="#0000BB">2</font><font color="#007700">, </font><font color="#0000BB">4</font><font color="#007700">, </font><font color="#0000BB">6</font><font color="#007700">, </font><font color="#0000BB">8</font><font color="#007700">);<br />echo </font><font color="#DD0000">"sum(a) = " </font><font color="#007700">. </font><font color="#0000BB">array_sum</font><font color="#007700">(</font><font color="#0000BB">$a</font><font color="#007700">) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br /><br /></font><font color="#0000BB">$b </font><font color="#007700">= array(</font><font color="#DD0000">"a" </font><font color="#007700">=> </font><font color="#0000BB">1.2</font><font color="#007700">, </font><font color="#DD0000">"b" </font><font color="#007700">=> </font><font color="#0000BB">2.3</font><font color="#007700">, </font><font color="#DD0000">"c" </font><font color="#007700">=> </font><font color="#0000BB">3.4</font><font color="#007700">);<br />echo </font><font color="#DD0000">"sum(b) = " </font><font color="#007700">. </font><font color="#0000BB">array_sum</font><font color="#007700">(</font><font color="#0000BB">$b</font><font color="#007700">) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P >上例将输出:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >sum(a) = 20 sum(b) = 6.9</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > PHP 4.2.1 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)。 </P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.array-splice.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.array-udiff-assoc.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >array_splice</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.array.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >array_udiff_assoc</TD ></TR ></TABLE ></DIV ></BODY ></HTML >