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php-manual-zh-5.2.4-1mdv2008.1.noarch.rpm

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><H1
><A
NAME="function.str-word-count"
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>str_word_count</H1
><DIV
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><A
NAME="AEN227302"
></A
><P
>    (PHP 4 &#62;= 4.3.0, PHP 5)</P
>str_word_count&nbsp;--&nbsp;
   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
>&#13;   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
>&#13;   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
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>string</CODE
></DT
><DD
><P
>&#13;       The string
      </P
></DD
><DT
><CODE
CLASS="parameter"
>format</CODE
></DT
><DD
><P
>&#13;       Specify the return value of this function. The current supported values
       are:
       <P
></P
><UL
><LI
><P
>&#13;          0 - returns the number of words found
         </P
></LI
><LI
><P
>&#13;          1 - returns an array containing all the words found inside the
          <CODE
CLASS="parameter"
>string</CODE
>
         </P
></LI
><LI
><P
>&#13;          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
>&#13;       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
>&#13;   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
>&#13;   <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
>&#13;        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
>&#13;   <TABLE
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><TR
><TD
><DIV
CLASS="example"
><A
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></A
><P
><B
>例 1. A <B
CLASS="function"
>str_word_count()</B
> example</B
></P
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br />$str </font><font color="#007700">= </font><font color="#DD0000">"Hello fri3nd, you're<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;looking&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;good today!"</font><font color="#007700">;<br /><br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">str_word_count</font><font color="#007700">(</font><font color="#0000BB">$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">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
>上例将输出：</P
><TABLE
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><TD
><PRE
CLASS="screen"
>Array
(
    [0] =&#62; Hello
    [1] =&#62; fri
    [2] =&#62; nd
    [3] =&#62; you're
    [4] =&#62; looking
    [5] =&#62; good
    [6] =&#62; today
)

Array
(
    [0] =&#62; Hello
    [6] =&#62; fri
    [10] =&#62; nd
    [14] =&#62; you're
    [29] =&#62; looking
    [46] =&#62; good
    [51] =&#62; today
)

Array
(
    [0] =&#62; Hello
    [1] =&#62; fri3nd
    [2] =&#62; you're
    [3] =&#62; looking
    [4] =&#62; good
    [5] =&#62; today
)

7</PRE
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>
  </P
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><DIV
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><A
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></A
><H2
>参见</H2
><P
>&#13;   <P
></P
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><A
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><B
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>explode()</B
></A
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><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
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></P
>
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