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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>Runs XPath query on XML data</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="function.simplexml-element-registerXPathNamespace.html">SimpleXMLElement->registerXPathNamespace</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.simplexml-import-dom.html">simplexml_import_dom</a></div> <div class="up"><a href="ref.simplexml.html">SimpleXML Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.simplexml-element-xpath" class="refentry"> <div class="refnamediv"> <h1 class="refname">SimpleXMLElement->xpath</h1> <p class="verinfo">(No version information available, might be only in CVS)</p><p class="refpurpose"><span class="refname">SimpleXMLElement->xpath</span> — <span class="dc-title">Runs XPath query on XML data</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="classsynopsis"> <div class="ooclass"><b class="classname">SimpleXMLElement</b></div> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><b><b>xpath</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$path</tt></span> )</div> </div> <p class="para"> The <i>xpath</i> method searches the SimpleXML node for children matching the <acronym title="XML Path Language">XPath</acronym> <i><tt class="parameter">path</tt></i>. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">path</tt></i></span> <dd> <p class="para"> An XPath path </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns an <a href="language.types.array.html" class="type array">array</a> of SimpleXMLElement objects or <b><tt>FALSE</tt></b> in case of an error. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 Xpath</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$string </span><span style="color: #007700">= <<<XML<br /></span><span style="color: #0000BB"><a><br /> <b><br /> <c>text</c><br /> <c>stuff</c><br /> </b><br /> <d><br /> <c>code</c><br /> </d><br /></a><br /></span><span style="color: #007700">XML;<br /><br /></span><span style="color: #0000BB">$xml </span><span style="color: #007700">= new </span><span style="color: #0000BB">SimpleXMLElement</span><span style="color: #007700">(</span><span style="color: #0000BB">$string</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* Search for <a><b><c> */<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">$xml</span><span style="color: #007700">-></span><span style="color: #0000BB">xpath</span><span style="color: #007700">(</span><span style="color: #DD0000">'/a/b/c'</span><span style="color: #007700">);<br /><br />while(list( , </span><span style="color: #0000BB">$node</span><span style="color: #007700">) = </span><span style="color: #0000BB">each</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">'/a/b/c: '</span><span style="color: #007700">,</span><span style="color: #0000BB">$node</span><span style="color: #007700">,</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">/* Relative paths also work... */<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">$xml</span><span style="color: #007700">-></span><span style="color: #0000BB">xpath</span><span style="color: #007700">(</span><span style="color: #DD0000">'b/c'</span><span style="color: #007700">);<br /><br />while(list( , </span><span style="color: #0000BB">$node</span><span style="color: #007700">) = </span><span style="color: #0000BB">each</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">'b/c: '</span><span style="color: #007700">,</span><span style="color: #0000BB">$node</span><span style="color: #007700">,</span><span style="color: #DD0000">"\n"</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>/a/b/c: text/a/b/c: stuffb/c: textb/c: stuff</pre></div> </pre></div> <div class="example-contents"><p> Notice that the two results are equal. </p></div> </div> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.simplexml-element-registerXPathNamespace.html">SimpleXMLElement->registerXPathNamespace</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.simplexml-import-dom.html">simplexml_import_dom</a></div> <div class="up"><a href="ref.simplexml.html">SimpleXML Functions</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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