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

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>DOMDocument-&#62;registerNodeClass()</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN39886"
></A
><P
>    (no version information, might be only in CVS)</P
>DOMDocument-&#62;registerNodeClass()&nbsp;--&nbsp;Register extended class used to create base node type</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN39889"
></A
><H2
>说明</H2
>class <B
CLASS="classname"
>DOMDocument</B
> { <BR
></BR
>bool <B
CLASS="methodname"
>registerNodeClass</B
> ( string baseclass, string extendedclass )<BR
></BR
>}<P
>&#13;   This method allows you to register your own extended DOM class to be used
   afterward by the PHP DOM extension.
  </P
><P
>&#13;   This method is not part of the DOM standard.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN39905"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>baseclass</CODE
></DT
><DD
><P
>&#13;       The DOM class that you want to extend. You can find a list of these 
       classes in the chapter introduction.
      </P
><P
>&#13;       Of course, you won't be able to register a class extending DOMDocument
       but you can always start your document by instanciating your own
       extending class.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>extendedclass</CODE
></DT
><DD
><P
>&#13;       Your extended class name. If <TT
CLASS="constant"
><B
>NULL</B
></TT
> is provided, any previously 
       registered class extending <CODE
CLASS="parameter"
>baseclass</CODE
> will
       be removed.
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN39922"
></A
><H2
>返回值</H2
><P
>&#13;   如果成功则返回 <TT
CLASS="constant"
><B
>TRUE</B
></TT
>，失败则返回 <TT
CLASS="constant"
><B
>FALSE</B
></TT
>。
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN39927"
></A
><H2
>更新日志</H2
><P
>&#13;   <DIV
CLASS="informaltable"
><P
></P
><A
NAME="AEN39930"
></A
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><THEAD
><TR
><TH
>版本</TH
><TH
>说明</TH
></TR
></THEAD
><TBODY
><TR
><TD
>PHP 5.2.2</TD
><TD
>&#13;        Prior to 5.2.2, a prviously registered <CODE
CLASS="parameter"
>extendedclass</CODE
>
        had to be unregistered before being able to register a new class extending
        the same <CODE
CLASS="parameter"
>baseclass</CODE
>.
       </TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN39942"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN39945"
></A
><P
><B
>例 1. Adding a new method to DOMElement to ease our code</B
></P
><TABLE
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br /></font><font color="#007700">class </font><font color="#0000BB">myElement </font><font color="#007700">extends </font><font color="#0000BB">DOMElement </font><font color="#007700">{<br />&nbsp;&nbsp;&nbsp;function </font><font color="#0000BB">appendElement</font><font color="#007700">(</font><font color="#0000BB">$name</font><font color="#007700">) { <br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return </font><font color="#0000BB">$this</font><font color="#007700">-&gt;</font><font color="#0000BB">appendChild</font><font color="#007700">(new </font><font color="#0000BB">myElement</font><font color="#007700">(</font><font color="#0000BB">$name</font><font color="#007700">));<br />&nbsp;&nbsp;&nbsp;}<br />}<br /><br />class </font><font color="#0000BB">myDocument </font><font color="#007700">extends </font><font color="#0000BB">DOMDocument </font><font color="#007700">{<br />&nbsp;&nbsp;&nbsp;function </font><font color="#0000BB">setRoot</font><font color="#007700">(</font><font color="#0000BB">$name</font><font color="#007700">) { <br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return </font><font color="#0000BB">$this</font><font color="#007700">-&gt;</font><font color="#0000BB">appendChild</font><font color="#007700">(new </font><font color="#0000BB">myElement</font><font color="#007700">(</font><font color="#0000BB">$name</font><font color="#007700">));<br />&nbsp;&nbsp;&nbsp;}<br />}<br /><br /></font><font color="#0000BB">$doc </font><font color="#007700">= new </font><font color="#0000BB">myDocument</font><font color="#007700">();<br /></font><font color="#0000BB">$doc</font><font color="#007700">-&gt;</font><font color="#0000BB">registerNodeClass</font><font color="#007700">(</font><font color="#DD0000">'DOMElement'</font><font color="#007700">, </font><font color="#DD0000">'myElement'</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// From now on, adding an element to another costs only one method call ! <br /></font><font color="#0000BB">$root </font><font color="#007700">= </font><font color="#0000BB">$doc</font><font color="#007700">-&gt;</font><font color="#0000BB">setRoot</font><font color="#007700">(</font><font color="#DD0000">'root'</font><font color="#007700">);<br /></font><font color="#0000BB">$child </font><font color="#007700">= </font><font color="#0000BB">$root</font><font color="#007700">-&gt;</font><font color="#0000BB">appendElement</font><font color="#007700">(</font><font color="#DD0000">'child'</font><font color="#007700">);<br /></font><font color="#0000BB">$child</font><font color="#007700">-&gt;</font><font color="#0000BB">setAttribute</font><font color="#007700">(</font><font color="#DD0000">'foo'</font><font color="#007700">, </font><font color="#DD0000">'bar'</font><font color="#007700">);<br /><br />echo </font><font color="#0000BB">$doc</font><font color="#007700">-&gt;</font><font color="#0000BB">saveXML</font><font color="#007700">();<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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>上例将输出：</P
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>&#60;?xml version="1.0"?&#62;
&#60;root&#62;&#60;child foo="bar"/&#62;&#60;/root&#62;</PRE
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