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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Register extended class used to create base node type</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="domdocument.normalizedocument.html">DOMDocument::normalizeDocument</a></div> <div class="next" style="text-align: right; float: right;"><a href="domdocument.relaxngvalidate.html">DOMDocument::relaxNGValidate</a></div> <div class="up"><a href="class.domdocument.html">DOMDocument</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="domdocument.registernodeclass" class="refentry"> <div class="refnamediv"> <h1 class="refname">DOMDocument::registerNodeClass</h1> <p class="verinfo">(PHP 5 >= 5.2.0)</p><p class="refpurpose"><span class="refname">DOMDocument::registerNodeClass</span> — <span class="dc-title">Register extended class used to create base node type</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>DOMDocument::registerNodeClass</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$baseclass</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$extendedclass</tt></span> )</div> <p class="para rdfs-comment"> This method allows you to register your own extended DOM class to be used afterward by the PHP DOM extension. </p> <p class="para"> This method is not part of the DOM standard. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">baseclass</tt></i></span> <dd> <p class="para"> The DOM class that you want to extend. You can find a list of these classes in the chapter introduction. </p> <p class="para"> 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> <dt> <span class="term"><i><tt class="parameter">extendedclass</tt></i></span> <dd> <p class="para"> Your extended class name. If <b><tt>NULL</tt></b> is provided, any previously registered class extending <i><tt class="parameter">baseclass</tt></i> will be removed. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure. </p> </div> <div class="refsect1 changelog"> <h3 class="title">ChangeLog</h3> <p class="para"> <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Version</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">PHP 5.2.2</td> <td colspan="1" rowspan="1" align="left"> Prior to 5.2.2, a previously registered <i><tt class="parameter">extendedclass</tt></i> had to be unregistered before being able to register a new class extending the same <i><tt class="parameter">baseclass</tt></i>. </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 Adding a new method to DOMElement to ease our code</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /><br /></span><span style="color: #007700">class </span><span style="color: #0000BB">myElement </span><span style="color: #007700">extends </span><span style="color: #0000BB">DOMElement </span><span style="color: #007700">{<br /> function </span><span style="color: #0000BB">appendElement</span><span style="color: #007700">(</span><span style="color: #0000BB">$name</span><span style="color: #007700">) { <br /> return </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">appendChild</span><span style="color: #007700">(new </span><span style="color: #0000BB">myElement</span><span style="color: #007700">(</span><span style="color: #0000BB">$name</span><span style="color: #007700">));<br /> }<br />}<br /><br />class </span><span style="color: #0000BB">myDocument </span><span style="color: #007700">extends </span><span style="color: #0000BB">DOMDocument </span><span style="color: #007700">{<br /> function </span><span style="color: #0000BB">setRoot</span><span style="color: #007700">(</span><span style="color: #0000BB">$name</span><span style="color: #007700">) { <br /> return </span><span style="color: #0000BB">$this</span><span style="color: #007700">-></span><span style="color: #0000BB">appendChild</span><span style="color: #007700">(new </span><span style="color: #0000BB">myElement</span><span style="color: #007700">(</span><span style="color: #0000BB">$name</span><span style="color: #007700">));<br /> }<br />}<br /><br /></span><span style="color: #0000BB">$doc </span><span style="color: #007700">= new </span><span style="color: #0000BB">myDocument</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$doc</span><span style="color: #007700">-></span><span style="color: #0000BB">registerNodeClass</span><span style="color: #007700">(</span><span style="color: #DD0000">'DOMElement'</span><span style="color: #007700">, </span><span style="color: #DD0000">'myElement'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// From now on, adding an element to another costs only one method call ! <br /></span><span style="color: #0000BB">$root </span><span style="color: #007700">= </span><span style="color: #0000BB">$doc</span><span style="color: #007700">-></span><span style="color: #0000BB">setRoot</span><span style="color: #007700">(</span><span style="color: #DD0000">'root'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$child </span><span style="color: #007700">= </span><span style="color: #0000BB">$root</span><span style="color: #007700">-></span><span style="color: #0000BB">appendElement</span><span style="color: #007700">(</span><span style="color: #DD0000">'child'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$child</span><span style="color: #007700">-></span><span style="color: #0000BB">setAttribute</span><span style="color: #007700">(</span><span style="color: #DD0000">'foo'</span><span style="color: #007700">, </span><span style="color: #DD0000">'bar'</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #0000BB">$doc</span><span style="color: #007700">-></span><span style="color: #0000BB">saveXML</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre><?xml version="1.0"?><root><child foo="bar"/></root></pre></div> </pre></div> </div> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="domdocument.normalizedocument.html">DOMDocument::normalizeDocument</a></div> <div class="next" style="text-align: right; float: right;"><a href="domdocument.relaxngvalidate.html">DOMDocument::relaxNGValidate</a></div> <div class="up"><a href="class.domdocument.html">DOMDocument</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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