📄 function.xpath-eval-expression.html
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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>Evaluates the XPath Location Path in the given string</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.domxml-xslt-version.html">domxml_xslt_version</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.xpath-eval.html">xpath_eval</a></div> <div class="up"><a href="ref.domxml.html">DOM XML Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.xpath-eval-expression" class="refentry"> <div class="refnamediv"> <h1 class="refname">xpath_eval_expression</h1> <p class="verinfo">(PHP 4 >= 4.0.4)</p><p class="refpurpose"><span class="refname">xpath_eval_expression</span> — <span class="dc-title"> Evaluates the XPath Location Path in the given string </span></p> </div> <div class="refsect1 unknown"> <h3 class="title">Description</h3> <div class="classsynopsis"> <div class="ooclass"><b class="classname">XPathContext</b></div> <div class="methodsynopsis dc-description"> <span class="type">XPathObject</span> <span class="methodname"><b><b>xpath_eval_expression</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$expression</tt></span> [, <span class="methodparam"><span class="type"><a href="class.domnode.html" class="type domnode">domnode</a></span> <tt class="parameter">$contextnode</tt></span> ] )</div> </div> <div class="methodsynopsis dc-description"> <span class="type"><span class="type XPathObject">XPathObject</span></span> <span class="methodname"><b><b>xpath_eval_expression</b></b></span> ( <span class="methodparam"><span class="type"><span class="type XPathContext">XPathContext</span></span> <tt class="parameter">$xpath_context</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$expression</tt></span> [, <span class="methodparam"><span class="type"><a href="class.domnode.html" class="type domnode">domnode</a></span> <tt class="parameter">$contextnode</tt></span> ] )</div> <p class="para rdfs-comment"> <div class="example"> <p><b>Example #1 <b>xpath_eval_expression()</b> Example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /><br /></span><span style="color: #007700">include(</span><span style="color: #DD0000">"example.inc"</span><span style="color: #007700">);<br /><br />if (!</span><span style="color: #0000BB">$dom </span><span style="color: #007700">= </span><span style="color: #0000BB">domxml_open_mem</span><span style="color: #007700">(</span><span style="color: #0000BB">$xmlstr</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">"Error while parsing the document\n"</span><span style="color: #007700">;<br /> exit;<br />}<br /><br /></span><span style="color: #0000BB">$xpath </span><span style="color: #007700">= </span><span style="color: #0000BB">xpath_new_context</span><span style="color: #007700">(</span><span style="color: #0000BB">$dom</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">xpath_eval_expression</span><span style="color: #007700">(</span><span style="color: #0000BB">$xpath</span><span style="color: #007700">, </span><span style="color: #DD0000">'/chapter/@language'</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>object(XPathObject)(2) { ["type"]=> int(1) ["nodeset"]=> array(1) { [0]=> object(domattribute)(5) { ["type"]=> int(2) ["name"]=> string(8) "language" ["value"]=> string(2) "en" [0]=> int(7) [1]=> int(138004256) } }}</pre></div> </pre></div> </div> </p> <p class="para"> See also <a href="function.xpath-eval.html" class="function">xpath_eval()</a>. </p> </div> </div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.domxml-xslt-version.html">domxml_xslt_version</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.xpath-eval.html">xpath_eval</a></div> <div class="up"><a href="ref.domxml.html">DOM XML 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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