<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >str_word_count</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="String 字符串处理函数" HREF="ref.strings.html"><LINK REL="PREVIOUS" TITLE="str_split" HREF="function.str-split.html"><LINK REL="NEXT" TITLE="strcasecmp" HREF="function.strcasecmp.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.str-split.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.strcasecmp.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.str-word-count" ></A >str_word_count</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN227302" ></A ><P > (PHP 4 >= 4.3.0, PHP 5)</P >str_word_count -- Return information about words used in a string </DIV ><DIV CLASS="refsect1" ><A NAME="AEN227305" ></A ><H2 >说明</H2 >mixed <B CLASS="methodname" >str_word_count</B > ( string string [, int format [, string charlist]] )<BR ></BR ><P > Counts the number of words inside <CODE CLASS="parameter" >string</CODE >. If the optional <CODE CLASS="parameter" >format</CODE > is not specified, then the return value will be an integer representing the number of words found. In the event the <CODE CLASS="parameter" >format</CODE > is specified, the return value will be an array, content of which is dependent on the <CODE CLASS="parameter" >format</CODE >. The possible value for the <CODE CLASS="parameter" >format</CODE > and the resultant outputs are listed below. </P ><P > For the purpose of this function, 'word' is defined as a locale dependent string containing alphabetic characters, which also may contain, but not start with "'" and "-" characters. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN227326" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >string</CODE ></DT ><DD ><P > The string </P ></DD ><DT ><CODE CLASS="parameter" >format</CODE ></DT ><DD ><P > Specify the return value of this function. The current supported values are: <P ></P ><UL ><LI ><P > 0 - returns the number of words found </P ></LI ><LI ><P > 1 - returns an array containing all the words found inside the <CODE CLASS="parameter" >string</CODE > </P ></LI ><LI ><P > 2 - returns an associative array, where the key is the numeric position of the word inside the <CODE CLASS="parameter" >string</CODE > and the value is the actual word itself </P ></LI ></UL > </P ></DD ><DT ><CODE CLASS="parameter" >charlist</CODE ></DT ><DD ><P > A list of additional characters which will be considered as 'word' </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN227354" ></A ><H2 >返回值</H2 ><P > Returns an array or an integer, depending on the <CODE CLASS="parameter" >format</CODE > chosen. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN227358" ></A ><H2 >更新日志</H2 ><P > <DIV CLASS="informaltable" ><P ></P ><A NAME="AEN227361" ></A ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><THEAD ><TR ><TH >版本</TH ><TH >说明</TH ></TR ></THEAD ><TBODY ><TR ><TD >5.1.0</TD ><TD > Added the <CODE CLASS="parameter" >charlist</CODE > parameter </TD ></TR ></TBODY ></TABLE ><P ></P ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN227372" ></A ><H2 >范例</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN227375" ></A ><P ><B >例 1. A <B CLASS="function" >str_word_count()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /><br />$str </font><font color="#007700">= </font><font color="#DD0000">"Hello fri3nd, you're<br /> looking good today!"</font><font color="#007700">;<br /><br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">str_word_count</font><font color="#007700">(</font><font color="#0000BB">$str</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">));<br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">str_word_count</font><font color="#007700">(</font><font color="#0000BB">$str</font><font color="#007700">, </font><font color="#0000BB">2</font><font color="#007700">));<br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">str_word_count</font><font color="#007700">(</font><font color="#0000BB">$str</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#DD0000">'àáãç3'</font><font color="#007700">));<br /><br />echo </font><font color="#0000BB">str_word_count</font><font color="#007700">(</font><font color="#0000BB">$str</font><font color="#007700">);<br /><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" >Array ( [0] => Hello [1] => fri [2] => nd [3] => you're [4] => looking [5] => good [6] => today ) Array ( [0] => Hello [6] => fri [10] => nd [14] => you're [29] => looking [46] => good [51] => today ) Array ( [0] => Hello [1] => fri3nd [2] => you're [3] => looking [4] => good [5] => today ) 7</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN227381" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.explode.html" ><B CLASS="function" >explode()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.preg-split.html" ><B CLASS="function" >preg_split()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.split.html" ><B CLASS="function" >split()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.count-chars.html" ><B CLASS="function" >count_chars()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.substr-count.html" ><B CLASS="function" >substr_count()</B ></A ></TD ></TR ></TBODY ></TABLE ><P ></P > </P ></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.str-split.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.strcasecmp.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >str_split</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.strings.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >strcasecmp</TD ></TR ></TABLE ></DIV ></BODY ></HTML >