Sophie: php-manual-zh-5.2.4-1mdv2008.1 noarch

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

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>DOMNodelist-&#62;item()</TITLE
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>DOMNodelist-&#62;item()</H1
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><A
NAME="AEN42406"
></A
><P
>    (no version information, might be only in CVS)</P
>DOMNodelist-&#62;item()&nbsp;--&nbsp;
   Retrieves a node specified by index
  </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN42409"
></A
><H2
>说明</H2
>class <B
CLASS="classname"
>DOMNodeList</B
> { <BR
></BR
>DOMNode <B
CLASS="methodname"
>item</B
> ( int index )<BR
></BR
>}<P
>&#13;   Retrieves a node specified by <CODE
CLASS="parameter"
>index</CODE
> within the 
   <B
CLASS="classname"
>DOMNodeList</B
> object.
  </P
><DIV
CLASS="tip"
><BLOCKQUOTE
CLASS="tip"
><P
><B
>提示: </B
>
    If you need to know the number of nodes in the collection, use 
    the <TT
CLASS="literal"
>length</TT
> property of the 
    <B
CLASS="classname"
>DOMNodeList</B
> object.
   </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN42427"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>index</CODE
></DT
><DD
><P
>&#13;       Index of the node into the collection.
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN42436"
></A
><H2
>返回值</H2
><P
>&#13;   The node at the <CODE
CLASS="parameter"
>index</CODE
>th position in the 
   <B
CLASS="classname"
>DOMNodeList</B
>, or <TT
CLASS="constant"
><B
>NULL</B
></TT
> if that is not a valid
   index.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN42442"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
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></A
><P
><B
>例 1. Traversing all the entries of the table</B
></P
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br />$doc </font><font color="#007700">= new </font><font color="#0000BB">DOMDocument</font><font color="#007700">;<br /></font><font color="#0000BB">$doc</font><font color="#007700">-&gt;</font><font color="#0000BB">load</font><font color="#007700">(</font><font color="#DD0000">'book.xml'</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$items </font><font color="#007700">= </font><font color="#0000BB">$doc</font><font color="#007700">-&gt;</font><font color="#0000BB">getElementsByTagName</font><font color="#007700">(</font><font color="#DD0000">'entry'</font><font color="#007700">);<br /><br />for (</font><font color="#0000BB">$i </font><font color="#007700">= </font><font color="#0000BB">0</font><font color="#007700">; </font><font color="#0000BB">$i </font><font color="#007700">&lt; </font><font color="#0000BB">$items</font><font color="#007700">-&gt;</font><font color="#0000BB">length</font><font color="#007700">; </font><font color="#0000BB">$i</font><font color="#007700">++) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#0000BB">$items</font><font color="#007700">-&gt;</font><font color="#0000BB">item</font><font color="#007700">(</font><font color="#0000BB">$i</font><font color="#007700">)-&gt;</font><font color="#0000BB">nodeValue </font><font color="#007700">. </font><font color="#DD0000">"\n"</font><font color="#007700">;<br />}<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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><P
>&#13;     Alternatively, you can use foreach, which is a much more convenient way:
    </P
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br /></font><font color="#007700">foreach (</font><font color="#0000BB">$items </font><font color="#007700">as </font><font color="#0000BB">$item</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#0000BB">$item</font><font color="#007700">-&gt;</font><font color="#0000BB">nodeValue </font><font color="#007700">. </font><font color="#DD0000">"\n"</font><font color="#007700">;<br />}<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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></TABLE
><P
>上例将输出：</P
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><TD
><PRE
CLASS="screen"
>Title
Author
Language
ISBN
The Grapes of Wrath
John Steinbeck
en
0140186409
The Pearl
John Steinbeck
en
014017737X
Samarcande
Amine Maalouf
fr
2253051209</PRE
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